Dexmedetomidine treatment regimens

Abstract

Disclosed herein are methods of administering dexmedetomidine or a pharmaceutically acceptable salt thereof to a human subject. The disclosed methods are particularly suitable for the treatment of agitation, especially when associated with neurodegenerative and / or neuropsychiatric diseases or disorders such as dementia of Alzheimer's type.

Description

Attorney Docket No.: BXTI-059 / 02WO 332712-2423 DEXMEDETOMIDINE TREATMENT REGIMENS CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of priority under 35 U.S.C. 119 (e) to U.S. Provisional Patent Application No. 63 / 510,101, which was filed on June 23, 2023, and U.S. Provisional Patent Application No. 63 / 523,098, which was filed on June 25, 2023; the disclosures of each of which are incorporated herein by reference in their entireties. This application also incorporates the subject matter of PCT Patent Application Publication No. WO2022 / 147537, filed January 4, 2022, by reference in its entirety. BACKGROUND OF THE INVENTION

[0002] On December 17, 1999, the U.S. Food and Drug Administration approved a dexmedetomidine product, PRECEDEX®, formulated as an intravenous solution for continuous infusion, and indicated as a sedative agent for initially intubated and mechanically ventilated patients during treatment in an intensive care setting. PRECEDEX®was later approved as a sedative agent for non-intubated patients prior to and / or during surgical and other procedures.

[0003] Dexmedetomidine has also been administered intravenously and via other routes to treat a range of conditions, often peri- or post-surgery, including the treatment of pain, anxiety, delirium, withdrawal symptoms, sleep disorders and agitation. However, administration of dexmedetomidine in an appropriate dosage form to provide effective, rapid, relief for the subject without also causing significant sedation is a challenging task. The utilization of dexmedetomidine has also been limited in clinical practice due to its common side effects, such as hypotension and bradycardia. For example, significant cardiovascular side-effects have occurred at therapeutic doses following administration of dexmedetomidine hydrochloride via a sublingual spray or tablets, or intravenously. Thus, a continuing, unmet need exists for an effective dexmedetomidine product which does not cause significant sedation, and desirably is effective without also producing significant adverse effects, such as cardiovascular events. The unmet need is particularly acute for non-addictive medicines that can effectively treat agitation or signs of agitation without also producing the aforementioned adverse effects and sedation.Attorney Docket No.: BXTI-059 / 02WO 332712-2423 SUMMARY

[0004] The inventors of the present application have surprisingly found that relatively low doses of dexmedetomidine or a pharmaceutically acceptable salt thereof are efficacious in treating agitation or signs of agitation in dementia patients. For example, administering dexmedetomidine or a pharmaceutically acceptable salt thereof to dementia patients results in about 38% higher Cmaxand about 55% higher AUC, when compared to the same dose administered to schizophrenia and bipolar disorder patients. The inventors also surprisingly found that pharmacokinetic effects following administration of dexmedetomidine or a pharmaceutically acceptable salt thereof varied in treating agitation in patients with different underlying conditions. For example, administering a dose of about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) sublingually or buccally to patients with dementia, produces similar pharmacokinetic effects as a dose of about 90 μg of dexmedetomidine hydrochloride, administered sublingually or buccally to patients with schizophrenia or bipolar disorder.

[0005] In other embodiments, the present disclosure provides methods of treating agitation or signs of agitation in a human subject suffering from dementia, without also inducing significant sedation, comprising administering about 30 μg to about 180 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0006] In embodiments, the present disclosure provides methods of treating agitation or signs of agitation in elderly patients (e.g., 65 years old or older) having dementia comprising administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the patient in an agitated state at a dose sufficient to provide a dexmedetomidine Cmaxfrom about 50 ng / L to about 300 ng / L; wherein the route of administration is to the oral mucosa, preferably sublingually, buccally, or gingivally. In embodiments, the patient is an elderly patient, for example, about 65 years old or older.

[0007] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered to an agitated patient suffering from dementia at a dose of about 30 μg to about 90 μg. In embodiments, the unit dose comprising about 30 μg to about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof is administered one to six times a day at an interval of at least 2 hours (e.g., about 2, 4, 6, 8, 10, or 12 hours) in the event of persistent or recurrent agitation. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 30 μg, about 40 μg, about 50 μg, about 60 μg, about 70 μg, about 80 μg, or about 90 μg. In embodiments, the dexmedetomidine or aAttorney Docket No.: BXTI-059 / 02WO 332712-2423 pharmaceutically acceptable salt thereof is administered at a dose of about 30 μg. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 40 μg. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 50 μg. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 60 μg. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 70 μg. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 80 μg. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 90 μg.

[0008] In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered to an agitated patient suffering from dementia at a dose of about 30 μg to about 90 μg, and the patient has not received treatment for hypertension prior to the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the patient has not received treatment for hypertension within about 10 hours, within about 1 day, within about 1 week prior to administration of the dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the patient is not sedated following administration of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the route of administration is to the oral mucosa, wherein the oromucosal administration includes sublingual, buccal or gingival. In embodiments, the AUC0-8is in the range of about 200 hr*ng / L to about 1500 hr*ng / L. In embodiments, the AUC0-infis in the range of about 200 hr*ng / L to about 2200 hr*ng / L. In embodiments, the agitation is acute agitation. In embodiments, the agitation is chronic agitation. In embodiments, the AUC values and Cmaxvalues are within the range of about 80% to about 125% of the given values. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., a hydrochloride salt) is administered oromucosally (e.g., sublingually or buccally) as a film. In embodiments, the patient achieves a mean change in PEC score of greater than -2 relative to baseline within 2 hours of administering the composition. In embodiments, the patient achieves a mean change in PAS score of greater than -2 relative to baseline within 2 hours of administering the composition. In embodiments, the patient achieves a mean change in Mod-CMAI score of greater than -7 relative to baseline 2 hours after administering the composition. In embodiments, the patient achieves a CGI-I score improvement to about a 1 (very much improved) or about a 2 (much improved). In embodiments, the agitation is reduced to a 2 (moderate agitation), 3 (mildAttorney Docket No.: BXTI-059 / 02WO 332712-2423 agitation) or 4 (normal behavior) within about 2 hours after administering the dexmedetomidine or a pharmaceutically acceptable salt thereof, as measured by the Agitation-Calmness Evaluation Scale (ACES). In embodiments, the elderly patient is about 70 years old or older. In embodiments, the elderly patient is about 75 to about 80 years old. In embodiments, the elderly patient is about 80 years old or older.

[0009] In embodiments, the present disclosure provides methods of treating acute agitation or signs of agitation in a human subject suffering from dementia, comprising administering about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof to the subject, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof is on “as- needed” basis.

[0010] In embodiments, the present disclosure provides methods of treating acute agitation or signs of agitation in a human subject suffering from dementia, comprising administering about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof is on “as- needed” (or PRN) basis.

[0011] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is self- administered by the subject. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered sublingually. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered buccally.

[0012] In embodiments, the present disclosure provides a method of treating an acute agitation episode in a patient having dementia of Alzheimer’s type, comprising administering 60 mcg dexmedetomidine or a pharmaceutically acceptable salt thereof to the oral mucosa of the patient, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is self- administered by the patient, and wherein the agitation is moderate to severe agitation, wherein the patient is at least 65 years old, optionally at least 75 years old.

[0013] In embodiments, the agitation is not due to pain, infection, concomitant medication, environmental conditions, or a psychiatric condition other than dementia.

[0014] In embodiments, the patient does not have delirium.

[0015] In embodiments, the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof sublingually.

[0016] In embodiments, the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof buccally.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0017] In embodiments, the patient is determined to have a total score ^14 on the Positive and Negative Syndrome Scale (PANSS) - Excited Component (PEC) scale prior to administration.

[0018] In embodiments, the PEC score decreases by about 4 to about 6 points within 2 hours post-administration.

[0019] In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film, spray or wafer. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film.

[0020] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered on as-needed (or PRN) basis.

[0021] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once or multiple times a day.

[0022] In embodiments the subject was not previously treated with any antipsychotic medication.

[0023] In embodiments the subject was previously treated with antipsychotic medication.

[0024] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once daily.

[0025] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered for at least 24 hours, 48 hours, 1 week, 2 weeks, 4 weeks or 6 weeks. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered for 12 weeks. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered up to a maximum of 28 doses within a period of 12 weeks. In embodiments, the subject is administered 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 or 28 doses of dexmedetomidine or a pharmaceutically acceptable salt thereof within a period of 12 weeks.

[0026] In embodiments, the agitation is psychotomor agitation.

[0027] In embodiments, the route of administration is oromucosal (e.g., sublingual, buccal or gingival). In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally as a film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered as a sublingual film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered as a buccal film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered as a gingival film.

[0028] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally for at least 1 week, 2 weeks, 6 weeks, 12 weeks. In embodiments,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally for about 15 weeks, 18 weeks, 21 weeks, 24 weeks or more. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally for as long as needed until the underlying disease resolves.

[0029] In embodiments, the subjects have a diagnosis of Alzheimer’s disease based on 2018 NIA-AA criteria. In embodiments, the subject has both dementia and Alzheimer’s disease.

[0030] In embodiments, the subjects have an MMSE score of 15 to 23. In embodiments, the subjects have a MMSE score of 16. In embodiments, the subjects have a MMSE score of 17. In embodiments, the subjects have an MMSE score of 18. In embodiments, the subjects have an MMSE score of 19. In embodiments, the subjects have an MMSE score of 20. In embodiments, the subjects have an MMSE score of 21. In embodiments, the subjects have an MMSE score of 22.

[0031] In embodiments, the subjects have a total score ^14 on the PEC scale prior to administering dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0032] In embodiments, the subjects have a total score of ^8 on the 4 items (aberrant vocalization, motor agitation, aggressiveness, and resisting care) comprising the Pittsburgh Agitation Scale (PAS) prior to administering dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0033] In embodiments, the subject is suffering from dementia for about 2 years. In embodiments, the subject is suffering from dementia for about 3 years. In embodiments, the subject is suffering from dementia for about 4 years. In embodiments, the subject is suffering from dementia for about 5 years or more.

[0034] In embodiments, the human subject is an elderly patient. In embodiments, the elderly patient is 65 years old or older. In embodiments, the elderly patient is 80 years old. In embodiments, the elderly patient is more than 80 years old.

[0035] In some embodiments, the agitation is chronic. In embodiments, the agitation is moderate to severe. In embodiments, the agitation is mild.

[0036] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject produces only mild to moderate adverse effects.

[0037] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in PECAttorney Docket No.: BXTI-059 / 02WO 332712-2423 total score compared to baseline score (i.e., pre-dose). In embodiments, the mean change in PEC score of greater than -2 relative to baseline is achieved within 2 hours of administration.

[0038] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in PAS score compared to baseline score (i.e., pre-dose). In embodiments, the mean change in PAS score of greater than -2 relative to baseline is achieved within 2 hours of administration.

[0039] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in ACES score compared to baseline score (i.e., pre-dose). In embodiments, the agitation is reduced to a 2 (moderate agitation), 3 (mild agitation) or 4 (normal behavior) within about 2 hours after administering the dexmedetomidine or a pharmaceutically acceptable salt thereof, as measured by the Agitation-Calmness Evaluation Scale (ACES).

[0040] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in CGI- I score compared to baseline score (i.e., pre-dose). In embodiments, the CGI-I score improvement to about a 1 (very much improved) or about a 2 (much improved) is observed.

[0041] In embodiments, the improvement in score is observed as early as within 30 minutes of administration. In embodiments, the improvement in score is observed as early as within 1 hour of administration. In embodiments, the improvement in score is observed as early as within 2 hours of administration.

[0042] In other embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering oromucosally (e.g., sublingually, buccally, or gingivally), to said subject about 30 μg to about 600 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the period of withdrawal is up to about 14 days. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered at a unit dose containing about 30 μg, about 60 μg, about 90 μg, about 120 μg, about 150 μg, about 180 μg, about 240 μg or about 300 μg twice daily. In embodiments, the period of withdrawal may be 13 days, 12 days, 11 days, 10 days, 9 days, 8 days, 7 days, 6 days, 5 days, 4 days, or 3 days. In other embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering oromucosally (e.g., sublingually, buccally, or gingivally), to said subject about 30 μg to about 600 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the period of withdrawal is up toAttorney Docket No.: BXTI-059 / 02WO 332712-2423 about 60 days. In embodiments, the period of withdrawal may be 59 days, 58 days, 57 days, 56 days, 55 days, 54 days, 53 days, 52 days, 51 days, 50 days, 49 days, 48 days, 47 days, 46 days, 45 days, 44 days, 43 days, 42 days, 41 days, 40 days, 39 days, 38 days, 37 days, 36 days, 35 days, 34 days, 33 days, 32 days, 31 days, 30 days, 29 days, 28 days, 27 days, 26 days, 25 days, 24 days, 23 days, 22 days, 21 days, 20 days, 19 days, 18 days, 17 days, 16 days, 15 days, 14 days, 13 days, 12 days, 11 days, 10 days, 9 days, 8 days, 7 days, 6 days, 5 days, 4 days or 3 days. In embodiments the human subject is an adult (e.g., 18 years or older). In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally (e.g., sublingually, buccally, gingivally), orally, intranasally or parenterally. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., hydrochloride) is administered sublingually as a film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt (e.g., dexmedetomidine hydrochloride) is administered buccally or sublingually as a film. In embodiments, the opioid withdrawal is withdrawal from use of fentanyl, morphine, codeine, heroin, oxycodone, hydrocodone, alfentanil, carfentanil, tramadol, hydromorphone, buprenorphine, naloxone, naltrexone, remifentanil, butorphanol, meperidine, methadone, dextropropoxyphene (propoxyphene) thebaine, sufentanil, or pentazocine or combinations thereof.

[0043] In embodiments, the disclosure provides methods of reducing a period of opioid withdrawal in a human subject in need thereof comprising administering dexmedetomidine or a pharmaceutically acceptable salt (e.g., dexmedetomidine hydrochloride) to the oral mucosa (i.e., sublingually, buccally, or gingivally) of said subject in an amount of about 30 μg to about 600 μg. In embodiments, the mean plasma concentrations is in the range of about 40 ng / L to about 500 ng / L after 2 hours following administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., dexmedetomidine hydrochloride). In embodiments, the mean plasma concentrations are in the range of about 20 ng / L to about 150 ng / L after 12 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride). In embodiments, the mean plasma concentrations are in the range of about 50 ng / L to about 500 ng / L after 2 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride). In embodiments, the mean plasma concentrations are in the range of about 10 ng / L to 150 ng / L after 12 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt.

[0044] In other embodiments, the present disclosure provides a method of treating agitation in an agitated dementia patient in need thereof, comprising administering a mucoadhesiveAttorney Docket No.: BXTI-059 / 02WO 332712-2423 oromucosal (e.g., sublingually, buccally, or gingivally) composition, to said patient in an amount of about 30 μg to about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered at a unit dose containing about 20 μg, about 30 μg, about 40 μg, about 50 μg, about 60 μg, about 70 μg, about 80 μg, about 90 μg, about 100 μg, about 110 μg, or about 120 μg once or twice daily. In embodiments, the patient has Alzheimer’s disease. In embodiments, the patient is 65 to 80 years old. In embodiments, the dose is about 30 mcg and the administration to the oral mucosa results in a Cmaxfrom about 36 ng / L to about 147 ng / L and an AUC0-infof from about 200 hr*ng / L to about 1500 hr*ng / L. In embodiments, the dose is about 40 mcg and the administration to the oral mucosa results in a Cmaxfrom about 50 ng / L to about 300 ng / L and an AUC0-inf of from about 200 hr*ng / L to about 1500 hr*ng / L.

[0045] The present disclosure also provides methods of managing or treating agitation in subjects with delirium, comprising administering to said subject about 20 μg to about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the subject is hospitalized. In embodiments, the subject is hospitalized in the intensive care unit. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered oromucosally (e.g., sublingually, buccally, or gingivally) at a dose of about 20 μg, about 30 μg, about 60 μg, about 80 μg, about 90 ^g, about 100 μg, about 120 μg, about 150 μg, about 180 μg, about 210 μg, about 240 μg, about 270 μg, or about 300 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered one to six times a day. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered twice a day. In order to achieve the desired dose, about may be oromucosally administered as a single unit dose, as multiple unit doses, or as a fraction of one or more unit doses (e.g. half of a unit dose), or a combination thereof. By way of example, to administer 120 ^g of dexmedetomidine or a pharmaceutically acceptable salt thereof, the subject may be administered for example, a single unit dose of 120 ^g of dexmedetomidine or a pharmaceutically acceptable salt thereof, two unit doses of 60 ^g of dexmedetomidine or a pharmaceutically acceptable salt thereof, or three unit doses of 40 Pg dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered as a film. Thus, half doses can be achieved by cutting the film in half, for example, cutting a 120 ^g or 180 ^g film in half to achieve a 60 ^g dose and a 90 ^g dose, respectively. In embodiments, the dose may be administered multiple times (e.g. one to four times) at an appropriate dosing interval (e.g. every 0.5 hours)Attorney Docket No.: BXTI-059 / 02WO 332712-2423 to produce a desired effect; for example, a 20 μg unit dose or a 60 μg unit dose can be administered four times at a dosing interval of every 0.5 hours within 6 hours of the first dose to produce the effect of a 80 μg dose and a 240 μg dose, respectively. In embodiments, each dosage unit may be administered one to two times at an appropriate dosing interval (every 12 hours) to produce a desired effect; for example, a 120 μg unit is administered two times in a day at an interval of 12 hours to produce the effect of a 240 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., every 1 to 6 hours) to produce a desired effect; for example, a 120 μg dose (starting dose) is administered followed by an additional seven doses in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 960 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., every 1 to 6 hours) to produce a desired effect; for example, a 180 μg dose (starting dose) is administered followed by an additional six doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 900 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (for e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 240 μg dose (starting dose) is administered followed by an additional six doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 960 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (for e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 300 μg dose (starting dose) is administered followed by additional five doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 900 μg dose. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered oromucosally (e.g., sublingually or buccally) as a film. In embodiments, the subject is 18-64 years old. In embodiments, the subject is over 65 years old. In embodiments, the dexmedetomidine is administered at a dose of about 60 μg, 90 μg, 120 μg and 150 μg one to six times a day (e.g., for patients that are 65 years old or older). In embodiments, the dexmedetomidine is administered at a dose of about 120 μg, 180 μg, 240 μg and 300 μg one to six times a day (e.g., for patients that are less than 65 years old). In embodiments, the subject is treated without experiencing clinically significant cardiovascular effects.

[0046] In embodiments, the disclosure provides methods of managing or treating agitation or signs of agitation in subjects with delirium, comprising administering a dose of about 20 μg, about 40 μg, about 60 μg, about 90 μg, about 120 μg or about 150 μg of dexmedetomidine orAttorney Docket No.: BXTI-059 / 02WO 332712-2423 a pharmaceutically acceptable salt thereof wherein the subject’s age is 65 years old or older. In embodiments, one to ten doses can be administered at an appropriate dosing interval (e.g.1 to 6 hours) to produce a desired effect; for example, about 60 μg, 90 μg, 120 μg, or 150 μg dose (starting dose) is administered followed by an additional 5-7 doses of 60 μg in a day at an interval ranging from about 1 to about 6 hours to produce the maximum cumulative dose of a 480 μg dose.

[0047] The disclosure also provides a pharmaceutical composition comprising from about 20 μg to about 300 μg dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. dexmedetomidine hydrochloride). In embodiments, the dose of dexmedetomidine is about 30 μg. In embodiments, the dose of dexmedetomidine is about 40 μg. In embodiments, the dose of dexmedetomidine is about 60 μg. In embodiments, the dose of dexmedetomidine is about 90 μg. In embodiments, the dose of dexmedetomidine is about 120 μg. In embodiments, the dose of dexmedetomidine is about 150 μg. In embodiments, the dose of dexmedetomidine is about 180 μg. In embodiments, the dose of dexmedetomidine is about 240 μg. In embodiments, the dose of dexmedetomidine is about 300 μg. In embodiments, the dose can be taken one to ten times a day. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG. 1 depicts change in PEC score from baseline in elderly dementia patients until 8 hours post-dose of 30 μg and 60 μg dexmedetomidine oromucosal thin film compared to placebo.

[0049] FIG. 2 depicts change in PAS score from baseline in elderly dementia patients until 8 hours post-dose of 30 μg and 60 μg dexmedetomidine oromucosal thin film compared to placebo.

[0050] FIG. 3 depicts change in Mod-CMAI score from baseline in elderly dementia patients at 2 hours post-dose of 30 μg and 60 μg dexmedetomidine oromucosal thin film compared to placebo.

[0051] FIG. 4 depicts percent response in elderly dementia patients at 1, 2, 4 and 8 hours following administration of 30 μg (middle bar) and 60μg dexmedetomidine (right bar) oromucosal film compared to placebo (left bar), as measured by Clinical Global Impression- Improvement (CGI-I).

[0052] FIG. 5 depicts calming improvement in elderly dementia patients at 2 hours following administration of 30 μg (middle bar) and 60 μg dexmedetomidine (right bar) oromucosal filmAttorney Docket No.: BXTI-059 / 02WO 332712-2423 compared to placebo (left bar), as measured by Agitation and Calmness Evaluation Scale (ACES).

[0053] FIG.6 depicts the Cmax (top) and AUC0-8 (bottom) dose relationship in elderly dementia patients.

[0054] FIG.7 depicts the Score Simulations of Placebo and SL administration Regimens.

[0055] FIG. 8 depicts the PEC Change from Baseline (%) Simulations of Placebo and SL administration Regimens.

[0056] FIG.9 depicts the PAS Score Simulations of Placebo and SL administration Regimens

[0057] FIG. 10 depicts the PAS Change from Baseline (%) Simulations of Placebo and SL administration Regimens.

[0058] FIG. 11 depicts the CMAI Score Simulations of Placebo and SL administration Regimens.

[0059] FIG. 12 depicts the CMAI Change from Baseline (%) Simulations of Placebo and SL administration Regimens.

[0060] FIG. 13 depicts Change from Baseline in PEC Total Score over time through 4 hours after the first dose (FAS population).

[0061] FIG. 14 depicts change from Baseline PANSS Excitatory Component (PEC) Total Score significant for first dose and all subsequent doses, where Response Demonstrated by PEC for all treated episodes according to Example 5.

[0062] FIG.15 depicts significant response rates at 1 and 2 hours post first-dose for 60 mcg, where clinically meaningful improvement has been confirmed by CGI-I according to Example 5.

[0063] FIG.16 depicts clinically meaningful improvement observed for all treated episodes of agitations as shown by CGI-I according to Example 5.

[0064] FIG. 17 depicts significant calming effects demonstrated by the Agitation Calming Evaluation Scale (ACES) score based on the post-first-dose result according to Example 5. DETAILED DESCRIPTION Abbreviations

[0065] ACES: Agitation-Calmness Evaluation Scale

[0066] AD: Alzheimer disease

[0067] AE: Adverse event

[0068] AUC: Area under the curveAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0069] AUC0-8: Area under the plasma concentration-time curve from time of administration to 8 hours

[0070] AUC0-inf: Area under the plasma concentration-time curve from time of administration to infinity

[0071] AUD: alcohol use disorder

[0072] BAC / BrAC: Breath Alcohol concentration

[0073] BAES: Biphasic Alcohol Effects Scale

[0074] BID: twice a day

[0075] BMI: Body mass index

[0076] CAPS-5: Clinician-Administered PTSD Scale for DSM-5

[0077] CGI-I: Clinical Global Impression-Improvement

[0078] CGI-S: Clinical Global Impression-Severity

[0079] CIWA-AR: Clinical Institute Withdrawal Assessment for Alcohol Scale

[0080] CLIA: Clinical Laboratory Improvement Amendments

[0081] Cmax: maximum plasma concentration

[0082] COWS: Clinical Opiate Withdrawal Scale

[0083] CMAI: Cohen Mansfield Agitation Inventory

[0084] CMC: Carboxy methylcellulose

[0085] C-SSRS: Columbia Suicide Severity Rating Scale

[0086] CT: Computed tomography

[0087] DBP: Diastolic Blood Pressure

[0088] DEQ: Drug Effects questionnaire

[0089] DES-R: Differential Emotions Scale

[0090] Dex or DEX: Dexmedetomidine

[0091] DSM: Diagnostic and Statistical Manual of Mental Disorders

[0092] DSMB: Drug Safety Monitoring Board

[0093] DT: Disintegration time

[0094] ECG: Electrocardiogram

[0095] FTD: Fronto temporal disease

[0096] HPC: Hydroxypropyl cellulose

[0097] HPMC: Hydroxyl propyl methyl cellulose

[0098] HR: Heart rate

[0099] HVLT-R: Hopkins Verbal Learning TestAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0100] ICH: International Conference on Harmonisation

[0101] ICU- Intensive care unit

[0102] IUD: intrauterine device

[0103] ITT: Intent to treat Population

[0104] LAR: Legally authorized representative

[0105] LEC-5 Life Event Checklist for DSM-5

[0106] LS: Least square

[0107] MedDRA: Medical Dictionary for Regulatory Activities

[0108] MINI-5: Mini-International Neuropsychiatric Interview for DSM-5

[0109] MMRM: Mixed model repeated measures

[0110] MMSE: Mini-Mental State Examination

[0111] MW: Molecular weight

[0112] mm: Millimeter

[0113] mcg: Microgram

[0114] mg: Milligrams

[0115] μg: Microgram

[0116] ml: Milliliter

[0117] mmHg: Millimeters of mercury

[0118] msec: Millisecond

[0119] NDS: Number of Drinks Scale

[0120] ng: Nanogram

[0121] PANSS: Positive and Negative Syndrome Scale

[0122] PAS: Pittsburgh Agitation Scale

[0123] PCL-5: PTSD Checklist for DSM-5

[0124] PCRS: Placebo-Control Reminder Script

[0125] PEC: PANSS Excitement Component

[0126] PEO: Polyethylene oxide

[0127] PD: Pharmacodynamic

[0128] PK: Pharmacokinetics

[0129] PTSD: posttraumatic stress disorder

[0130] PVA: Polyvinyl alcohol

[0131] QTcF: QT interval corrected for heart rate using Fridericia’s formula

[0132] QID: Quater in dieAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0133] RASS: Richmond Agitation Sedation Scale

[0134] RVIP: Rapid Information Processing Task

[0135] SAE: Serious adverse event

[0136] SOWS-Gossop: Short Opiate Withdrawal Scale of Gossop

[0137] SAP: Statistical Analysis Plan

[0138] SBP: Systolic Blood Pressure

[0139] SD: Standard deviation

[0140] SE: Standard error

[0141] SL: Sublingual

[0142] STAI: State Trait Anxiety Inventory

[0143] T1 / 2: Elimination half-life

[0144] TEAE: Treatment emergent adverse event

[0145] TLFB: Timeline Follow Back

[0146] Tmax: Time of maximum plasma concentration

[0147] Wt%: Weight percentage

[0148] ULN: Upper limit of normal

[0149] VAS: Visual Analog Scale

[0150] YCS: Yale craving scale

[0151] YMRS: Young Mania Rating Scale Definitions

[0152] Throughout the present specification, numerical ranges are provided for certain quantities. It is to be understood that these ranges comprise all subranges therein. Thus, the range “from 50 to 80” includes all possible ranges therein (e.g., 51-79, 52-78, 53-77, 54-76, 55-75, 60-70, etc.). Furthermore, all values within a given range may be an endpoint for the range encompassed thereby (e.g., the range 50-80 includes the ranges with endpoints such as 55-80, 50-75, etc.).

[0153] The term “a” or “an” refers to one or more of that entity. As such, the terms “a” (or “an”), “one or more” and “at least one” are used interchangeably herein. In addition, reference to “an agent” by the indefinite article “a” or “an” does not exclude the possibility that more than one of the agents are present, unless the context clearly requires that there is one and only one of the agents.

[0154] As used herein, “about” means plus or minus 10% of the indicated numerical value.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0155] The term "agitation", as used herein, means irritability, emotional outburst, impaired thinking, or excess motor and verbal activity that may occur due to either dysfunction of specific brain regions such as frontal lobes or due to dysfunction of neurotransmitter systems such as dopamine and nor-epinephrine. In the present disclosure, agitation also includes aggression and hyper-arousal in post-traumatic stress disorder. The agitation may be acute or chronic.

[0156] The term “buccal” means administration of the dosage form against the gum and the inner lip or cheek.

[0157] As used herein, the term “comprise” as is used in this description and in the claims and its conjugations are used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. The present disclosure may suitably “comprise”, “consist of”, or “consist essentially of”, the steps, elements, and / or reagents described in the claims.

[0158] The term “clinically significant cardiovascular effects” means herein a lowering in blood pressure (hypotension) and / or heart rate (bradycardia) to the extent that medical intervention is required to address the cardiovascular side effects, where the term “medical intervention” means an intervention that more serious than administering fluids, such as an energy drink.

[0159] As used herein, the phrase “deposited on the surface of a polymer matrix” means that dexmedetomidine or a pharmaceutically acceptable salt thereof is formulated as liquid composition separate from the preparation of the solid polymer matrix, and deposited onto the solid polymer, e.g., as one or more micro-deposits, where it dries. The dried product is sometimes referred to herein as the “micro-deposited matrix film”. The drug liquid formulation may be in any form, including as a solution, emulsion, suspension, or dispersion.

[0160] As used herein, the phrase “disposed within a polymer matrix” means that dexmedetomidine or a pharmaceutically acceptable salt thereof is incorporated directly into the polymer solution prior to the formation of the solid polymer matrix film composition.

[0161] The term “dissolvable” means the films herein are readily disintegrated, e.g., at least within about 20 minutes, following administration to the oral mucosa. Disintegration is achieved by saliva and / or other aqueous materials on the mucosal surface.

[0162] The term "an effective amount" is interchangeable with "therapeutically effective dose," or "therapeutically effective amount," and refers to an amount sufficient to produce the desiredAttorney Docket No.: BXTI-059 / 02WO 332712-2423 effect. An effective amount is sufficient to cause an improvement in a condition (e.g., agitation) of the subject.

[0163] The term “film” herein includes thin films, in any shape, including rectangular, square, or other desired shape. The film may be of any desired thickness and size, such that it can be conveniently placed oromucosally in the patient. For example, the film may be a relatively thin film having a thickness of from about 20 micrometers to about 200 micrometers or may be a somewhat thicker film having a thickness of from about 20 micrometers to about 1000 micrometers. In embodiments, the film may be even thicker, e.g., having a thickness greater than about 30 millimeters.

[0164] The terms “formulation” and “composition” are used interchangeably, except where otherwise clearly intended to have different meanings.

[0165] The term “intranasal administration” means administration by the nasal route, whereby a drug is insufflated through the nose. The administration can be either topical or systemic, meaning the locally delivered drug can go on to exhibit either purely local or systemic effects.

[0166] The term “mucoadhesion” is used herein to refer to adhesion to mucosal membranes, such as those in the oral cavity.

[0167] The term “mucoadhesive” refers to the property of adhering to a mucosal tissue surface in vivo. Such adhesion adherently localizes the dosage form onto the mucus membrane and requires the application of a force to separate the mucoadhesive material from the mucus membrane.

[0168] “Opioid or alcohol or substance withdrawal” refers to a variety of signs and complaints appearing with the abrupt removal of, or a rapid decrease in the regular dosage of opioids or alcohol or other substance. Physical manifestations may include sweating, nausea, yawning, chills, diarrhea, papillary dilation, piloerection, tachycardia, increased blood pressure, hypersensitivity to pain, stomach cramps, and muscle cramps. Opioid or alcohol or substance withdrawal is a set of symptoms (a syndrome) arising from the sudden withdrawal or reduction of opioids alcohol or other substance where previous usage has been heavy and prolonged. Signs and symptoms of withdrawal can include drug craving, anxiety, restless legs, nausea, vomiting, diarrhea, sweating, and an increased heart rate. Psychological manifestations of opioid withdrawal may include agitation, dysphoria, restlessness, irritability, anxiety, and depression. In embodiments, the opioid withdrawal symptom is agitation. In embodiments, treating or ameliorating opioid withdrawal refers to the treatment or lessening of one or more of the aforementioned symptoms.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0169] The term “oromucosal” means administration to the oral mucosa, specifically the oral cavity and / or the pharynx. Oromucosal administration includes administration by sublingual, buccal, or gingival routes.

[0170] The term “parenteral” refers to administration of a drug by injection under one or more layer of skin or mucous membrane, and can include, for example, subcutaneous, intravenous, intraperitoneal or intramuscular injection.

[0171] The term "pharmaceutically acceptable carrier" refers to a pharmacologically inert substance to be used as a carrier. As used herein, the phrase “carrier” and “excipients” are used interchangeably, except where otherwise clearly intended to have different meanings.

[0172] The term “pharmaceutically acceptable salt" refers to a salt known to be non-toxic and commonly used in the pharmaceutical literature. Typical inorganic acids used to form such salt include hydrochloric, hydrobromic, hydroiodic, nitric, sulfuric, phosphoric, hypophosphoric, and the like. Salts derived from organic acids, such as aliphatic mono and dicarboxylic acids, phenyl substituted alkanoic acids, hydroxyalkanoic and hydroxyl alkandioic acids, aromatic acids, aliphatic and aromatic sulfonic acids may also be used. A preferred salt is the hydrochloride salt.

[0173] The term “self-supporting” means the films herein maintain structural integrity upon handling without the need for a backing layer. Some flexibility in the film is contemplated and may be desirable.

[0174] The term " signs of agitation" includes excessive motor activity (examples include: pacing, rocking, gesturing, pointing fingers, restlessness, performing repetitious mannerisms), verbal aggression (e.g. yelling, speaking in an excessively loud voice, using profanity, screaming, shouting, threatening other people), physical aggression (e.g. grabbing, shoving, pushing, clenching hands into fists, resisting, hitting others, kicking objects or people, scratching, biting, throwing objects, hitting self, slamming doors, tearing things), and destroying property.

[0175] As used herein, the term “subject” or “patient” preferably refers to a human subject or patient. In embodiments, however, the subject can be any animal, including non-human mammals, such as mice, rats, other rodents, rabbits, dogs, cats, swine, cattle, sheep, horses, or primates.

[0176] The term “significantly reduced” refers to a reduction level by at least 10% or higher, preferably 20% or higher, more preferably 40% or higher, even more preferably 60% or higher, still more preferably 80% or higher, and 90% or higher, as compared to a control. For example,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 in the context of agitation, the skilled artisan will readily understand that the reduction can be measured in terms of well-known agitation scales, such as PEC score and CGI-I As an example, when agitation is significantly reduced in a patient, the reduction may be interpreted as as those who achieve at least a 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 100% or greater reduction in PEC total score from baseline (e.g. measured at 2 hours post-dose). In embodiments, significantly reduced agitation refers to at least a 40% reduction in PEC total score from baseline. Similarly, a significant reduction in agitation may be measured on the CGI- I scale and may refer to a patient that has a score of 1 or 2 on the CGI-I scale (e.g. measured at 1, 2, or 4 hours post-dose) or the Agitation-Calmness Evaluation Scale (ACES) scale and may refer to a patient that has a score of e.g.3 or higher.

[0177] The term "sublingual" means "under the tongue" and refers to a method of administering substances via the blood vessels under the tongue. Sublingual absorption occurs through the highly vascularized sublingual mucosa, which allows a substance direct access to the blood circulation, thereby providing for direct systemic administration independent of gastrointestinal influences and avoiding undesirable first-pass hepatic metabolism.

[0178] “Therapeutic” as used herein, refer to treatment and / or prophylaxis, depending on context.

[0179] The terms “treat”, "treating," and "treatment," as used herein refer to a particular disease or disorder includes lessening, improving, ameliorating or abrogating the symptoms and / or pathology of the disease or disorder.

[0180] The term "prevention” means preventing the occurrence of a disease or condition, or associated symptoms or preventing the recurrence of the same, for example after a period of improvement.

[0181] The term “unit dose,” “unit dosage,” or “unit dosage form” means a physically discrete unit that contains a predetermined quantity of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0182] As used herein, the phrase “water-soluble polymer” refers to (i) a polymer that is at least partially soluble in water, and desirably fully or predominantly soluble in water, and / or (ii) a polymer that absorbs water. Polymers that absorb water are referred to herein as water- swellable polymers.

[0183] The term “without significant sedation” and the like means that the patient experiences a level of sedation not greater than Level 3 on the Ramsay Sedation Scale. Level 3 means sedatedAttorney Docket No.: BXTI-059 / 02WO 332712-2423 but responds to commands. In embodiments, the dexmedetomidine may be dosed to achieve a Richmond Agitation Sedation Scale (RASS) of -1 (“light sedation”).

[0184] The term AUC0-inf represents the total drug exposure across time. AUC0-inf is calculated as the sum of AUClastand AUCext. AUClastis calculated by integration of the concentration-time data using the trapezoidal rule up to the last quantifiable concentration. AUCextis calculated by dividing the last quantifiable concentration by the elimination rate constant.

[0185] The term “PRN” or “as-needed” refers to administration of prescribed medication (dexmedetomidine sublingual film herein) is not scheduled, rather it is administered whenever there is a need. Active agent

[0186] Dexmedetomidine has the IUPAC name (+) 4-(S)-[1-(2,3-dimethylphenyl)ethyl]-1H- imidazole. As the monohydrochloride salt, it is predominantly used as a medication for the sedation of patients during treatment in an intensive care setting or to sedate patients prior to and / or during surgical and other procedures. Such medication is currently sold under the registered trade name "PRECEDEX®".

[0187] Pharmaceutically acceptable salts of dexmedetomidine that may be included herein generally include any suitable salt that has been or may be approved by the U.S. FDA or other appropriate foreign or domestic agency for administration to a human. Non-limiting examples of suitable pharmaceutically acceptable salts include salts of inorganic acids such as hydrochloric, hydrobromic, nitric, carbonic, monohydrocarbonic, phosphoric, monohydrogen phosphoric, dihydrogen phosphoric, sulfuric, hydrogen sulfuric, and hydroiodic acid. Other examples include salts derived from non-toxic organic acids, including acetic, propionic, isobutyric, maleic, malonic, benzoic, succinic, suberic, fumaric, lactic, mandelic, phthalic, benzenesulfonic, p-toluenesulfonic, citric, tartaric, and methanesulfonic acids, or combinations of these acid salts. Exemplary salts include dexmedetomidine hydrochloride, dexmedetomidine hydrobromide, dexmedetomidine sulfate, dexmedetomidine sulfonate, dexmedetomidine phosphate, dexmedetomidine nitrate, dexmedetomidine formate, dexmedetomidine citrate, dexmedetomidine tartrate, dexmedetomidine malate, dexmedetomidine benzoate, dexmedetomidine salicylate, dexmedetomidine ascorbate or the like. In embodiments, deuterated forms of dexmedetomidine or a pharmaceutically acceptable salt thereof may be included. Methods and administrationAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0188] In embodiments, the disclosure encompasses methods of treating agitation or signs of agitation in a subject comprising oromucosally administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the subject in an agitated state. In embodiments, the disclosure includes a method of treating agitation or signs of agitation in a subject with dementia comprising oromucosally administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the subject in an agitated state. In embodiments, the disclosure provides methods of treating agitation in elderly patients having dementia comprising oromucosally administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the patient in an agitated state. In embodiments, the disclosure provides methods of managing or treating agitation in subjects with delirium, comprising oromucosally administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the patient in an agitated state. In embodiments, the disclosure also provides methods of treating or ameliorating opioid withdrawal or related symptoms, comprising oromucosally administering dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) to a patient in need thereof. In embodiments, the disclosure provides a method of treating cocaine toxicity and / or symptoms associated with cocaine toxicity comprising oromucosally administering an effective amount of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the disclosure provides a method of treating agitation or signs of agitation in a pediatric subject comprising oromucosally administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the subject in an agitated state. In embodiments, the agitation is acute agitation. In embodiments, the agitation is chronic agitation. In embodiments, the disclosure is a method of treating agitation without also inducing significant sedation. In embodiments, the treatment is effective without causing clinically significant cardiovascular effects.

[0189] The exemplary dosage of dexmedetomidine or a pharmaceutically acceptable salt thereof to be administered to a particular patient in the various methods of the invention will depend on the type and extent of the condition, the overall health status of the particular patient, the particular form of dexmedetomidine or a pharmaceutically acceptable salt thereof being administered, and the particular formulation used to treat the patient. In embodiments, one or more units (e.g., film composition) is administered to deliver the dose. In embodiments, the dose can be given by combining two or more dose units, for example, 60 μg (30 μg unit + 30 μg unit), 90 μg (30 μg unit + 60 μg unit), 120 μg (60 μg unit + 60 μg unit), 150 μg (half of 120 μg unit + half of 180 μg unit), 240 μg (180 μg unit + half of 120 μg unit), 300 μg (120 μg unitAttorney Docket No.: BXTI-059 / 02WO 332712-2423 + 180 μg unit) and so on. The dose may be administered one or more times a day including twice, three times, four times, five times or six times per day.

[0190] In embodiments, the dosage of dexmedetomidine or a pharmaceutically acceptable salt thereof administered is between about 0.5 μg to about 1200 μg. Examples of suitable dosages include, e.g., about 0.5 μg to about 1200 μg, about 0.5 μg to about 500 μg, about 0.5 μg to about 450 μg, about 0.5 μg to about 405 μg, about 0.5 μg to about 360 μg, about 0.5 μg to about 270 μg, about 0.5 μg to about 180 μg, and about 0.5 μg to about 120 μg.

[0191] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered at a dose of about 10 μg to about 300 μg, e.g., about 10 μg, about 15 μg, about 20 μg, about 25 μg, about 30 μg, about 35 μg, about 40 μg, about 45 μg, about 50 μg, about 55 μg, about 60 μg, about 65 μg, about 70 μg, about 75 μg, about 80 μg, about 85 μg, about 90 μg, about 95 μg, about 100 μg, about 105 μg, about 110 μg, about 115 μg, about 120 μg, about 125 μg, about 130 μg, about 135 μg, about 140 μg, about 145 μg, about 150 μg, about 155 μg, about 160 μg, about 165 μg, about 170 μg, about 175 μg, about 180 μg, about 185 μg, about 190 μg, about 195 μg, about 200 μg, about 205 μg, about 210 μg, about 215 μg, about 220 μg, about 225 μg, about 230 μg, about 235 μg, about 240 μg, about 245 μg, about 250 μg, about 255 μg, about 260 μg, about 265 μg, about 270 μg, about 275 μg, about 280 μg, about 285 μg, about 290 μg, about 295 μg, about 300 μg, including all values and ranges in between.

[0192] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered at a dose of about 120 μg to about 405 μg, e.g. about 120 μg, about 125 μg, about 130 μg, about 135 μg, about 140 μg, about 145 μg, about 150 μg, about 155 μg, about 160 μg, about 165 μg, about 170 μg, about 175 μg, about 180 μg, about 185 μg, about 190 μg, about 195 μg, about 200 μg, about 205 μg, about 210 μg, about 215 μg, about 220 μg, about 225 μg, about 230 μg, about 235 μg, about 240 μg, about 245 μg, about 250 μg, about 255 μg, about 260 μg, about 265 μg, about 270 μg, about 275 μg, about 280 μg, about 285 μg, about 290 μg, about 295 μg, about 300 μg, about 305 μg, about 310 μg, about 315 μg, about 320 μg, about 325 μg, about 330 μg, about 335 μg, about 340 μg, about 345 μg, about 350 μg, about 355 μg, about 360 μg, about 365 μg, about 370 μg, about 375 μg, about 380 μg, about 385 μg, about 390 μg, about 395 μg, about 400 μg, or about 405 μg, including all values and ranges in between. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered at a dose of about 120 μg to about 405 μg, e.g., about 120 μg to about 270 μg, about 120 μg and about 180 μg.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0193] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered oromucosally (e.g. sublingually or buccally) at a dose of about 10 μg to about 300 μg, e.g., about 10 μg, about 15 μg, about 20 μg, about 25 μg, about 30 μg, about 35 μg, about 40 μg, about 45 μg, about 50 μg, about 55 μg, about 60 μg, about 65 μg, about 70 μg, about 75 μg, about 80 μg, about 85 μg, about 90 μg, about 95 μg, about 100 μg, about 105 μg, about 110 μg, about 115 μg, about 120 μg, about 125 μg, about 130 μg, about 135 μg, about 140 μg, about 145 μg, about 150 μg, about 155 μg, about 160 μg, about 165 μg, about 170 μg, about 175 μg, about 180 μg, about 185 μg, about 190 μg, about 195 μg, about 200 μg, about 205 μg, about 210 μg, about 215 μg, about 220 μg, about 225 μg, about 230 μg, about 235 μg, about 240 μg, about 245 μg, about 250 μg, about 255 μg, about 260 μg, about 265 μg, about 270 μg, about 275 μg, about 280 μg, about 285 μg, about 290 μg, about 295 μg, about 300 μg, including all values and ranges in between. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered oromucosally (e.g. sublingually or buccally) at a dose of about 10 μg to about 300 μg, e.g. about 10 μg to 270 μg, about 20 μg to about 240 μg, about 30 μg to about 180 μg, about 40 μg to about 140 μg, about 50 μg to about 120 μg , about 60 μg to about 120 μg, about 70 μg to about 100 μg, about 80 μg to about 100 μg.

[0194] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 300 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 270 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 240 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 210 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 180 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 150 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 120 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 90 μg.Attorney Docket No.: BXTI-059 / 02WO 332712-2423 In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 60 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 40 μg. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) is oromucosally administered in an amount of about 30 μg. In embodiments, the dosages of dexmedetomidine or a pharmaceutically acceptable salt thereof are administered at a dose of about 30 μg to about 180 μg (e.g., 30 μg, 40 μg, 45 μg, 60 μg, 90 μg, 120 μg or 180 μg) In embodiments, one or more units is administered to deliver the dose.

[0195] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered intramuscularly at a dose of about 100 μg to about 200 μg, e.g. about 100 μg, about 105 μg, about 110 μg, about 115 μg, about 120 μg, about 125 μg, about 130 μg, about 135 μg, about 140 μg, about 145 μg, about 150 μg, about 155 μg, about 160 μg, about 165 μg, about 170 μg, about 175 μg, about 180 μg, about 185 μg, about 190 μg, about 195 μg, or about 200 μg, including all values and ranges in between. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered intramuscularly at a dose of about 100 μg to about 200 μg, e.g. about 120 μg to about 190 μg.

[0196] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered orally at a dose of about 500 μg to about 1500 μg based on total weight of the oral composition, e.g., about 500 μg, about 510 μg, about 520 μg, about 530 μg, about 540 μg, about 550 μg, about 560 μg, about 570 μg, about 580 μg, about 590 μg, about 600 μg, about 610 μg, about 620 μg, about 630 μg, about 640 μg, about 650 μg, about 660 μg, about 670 μg, about 680 μg, about 690 μg, about 700 μg, about 710 μg, about 720 μg, about 730 μg, about 740 μg, about 750 μg, about 760 μg, about 770 μg, about 780 μg, about 790 μg, about 800 μg, about 810 μg, about 820 μg, about 830 μg, about 840 μg, about 850 μg, about 860 μg, about 870 μg, about 880 μg, about 890 μg, about 900 μg, about 910 μg, about 920 μg, about 930 μg, about 940 μg, about 950 μg, about 960 μg, about 970 μg, about 980 μg, about 990 μg, about 1000 μg, about 1010 μg, about 1020 μg, about 1030 μg, about 1040 μg, about 1050 μg, about 1060 μg, about 1070 μg, about 1080 μg, about 1090 μg, about 1100 μg, about 1110 μg, about 1120 μg, about 1130 μg, about 1140 μg, about 1150 μg, about 1160 μg, about 1170 μg, about 1180 μg, about 1190 μg, about 1200 μg, about 1210 μg, about 1220 μg, about 1230 μg, about 1240 μg, about 1250 μg, about 1260 μg, about 1270 μg, about 1280 μg, about 1290 μg, about 1300 μg, about 1310 μg, about 1320 μg, about 1330 μg, about 1340 μg, about 1350 μg, aboutAttorney Docket No.: BXTI-059 / 02WO 332712-2423 1360 μg, about 1370 μg, about 1380 μg, about 1390 μg, about 1400 μg, about 1410 μg, about 1420 μg, about 1430 μg, about 1440 μg, about 1450 μg, about 1460 μg, about 1470 μg, about 1480 μg, about 1490 μg, or about 1500 μg, including all values and ranges in between.

[0197] In embodiments, the dose is about 30 μg and the AUC0-8range is between about 200 hr*ng / L to about 600 hr*ng / L, for example, about 200 hr*ng / L to about 400 hr*ng / L, about 300 hr*ng / L to about 600 hr*ng / L, about 300 hr*ng / L to about 500 hr*ng / L, about 350 hr*ng / L to about 450 hr*ng / L.

[0198] In embodiments, the dose is about 30 μg and the AUC0-infis about 200 hr*ng / L to about 1700 hr*ng / L, e.g., about 200 hr*ng / L, about 225 ng*hr / mL, about 250 ng*hr / mL, about 275 ng*hr / mL, about 300 ng*hr / mL, about 325 ng*hr / mL, about 350 ng*hr / mL, about 375 ng*hr / mL, about 400 ng*hr / mL, about 425 ng*hr / mL, about 450 ng*hr / mL, about 475 ng*hr / mL, about 500 ng*hr / mL, about 525 ng*hr / mL, about 550 ng*hr / mL, about 575 ng*hr / mL, about 600 ng*hr / mL, about 625 ng*hr / mL, about 650 ng*hr / mL, about 675 ng*hr / mL, about 700 ng*hr / mL, about 725 ng*hr / mL, about 750 ng*hr / mL, about 775 ng*hr / mL, about 800 ng*hr / mL, about 825 ng*hr / mL, about 850 ng*hr / mL, about 875 ng*hr / mL, about 900 ng*hr / mL, about 925 ng*hr / mL, about 950 ng*hr / mL, about 975 ng*hr / mL, about 1000 ng*hr / mL, about 1025 ng*hr / mL, about 1050 ng*hr / mL, about 1075 ng*hr / mL, about 1100 ng*hr / mL, about 1125 ng*hr / mL, about 1150 ng*hr / mL, about 1175 ng*hr / mL, about 1200 ng*hr / mL, about 1225 ng*hr / mL, about 1250 ng*hr / mL, about 1275 ng*hr / mL, about 1300 ng*hr / mL, about 1325 ng*hr / mL, about 1350 ng*hr / mL, about 1375 ng*hr / mL, about 1400 ng*hr / mL, about 1425 ng*hr / mL, about 1450 ng*hr / mL, about 1475 ng*hr / mL, about 1500 ng*hr / mL, about 1525 ng*hr / mL, about 1550 ng*hr / mL, about 1575 ng*hr / mL, about 1600 ng*hr / mL, about 1625 ng*hr / mL, about 1650 ng*hr / mL, about 1675 ng*hr / mL, or about 1700 ng*hr / mL, including all values and ranges in between.

[0199] In embodiments, the dose is about 30 μg, the AUC0-8range is about 80% to 125% of about 200 hr*ng / L to about 600 hr*ng / L and the AUC0-inf range is about 80% to 125% of about 200 hr*ng / L to about 1700 hr*ng / L.

[0200] In embodiments, the dose is about 40 μg and the AUC0-inf range is about 80% to 125% of about 300 hr*ng / L to about 2200 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L , about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / LAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0201] In embodiments, the dose is about 40 μg and the AUC0-inf is about 300 hr*ng / L to about 2200 hr*ng / L, e.g., about 300 hr*ng / L, about 325 ng*hr / mL, about 350 ng*hr / mL, about 375 ng*hr / mL, about 400 ng*hr / mL, about 425 ng*hr / mL, about 450 ng*hr / mL, about 475 ng*hr / mL, about 500 ng*hr / mL, about 525 ng*hr / mL, about 550 ng*hr / mL, about 575 ng*hr / mL, about 600 ng*hr / mL, about 625 ng*hr / mL, about 650 ng*hr / mL, about 675 ng*hr / mL, about 700 ng*hr / mL, about 725 ng*hr / mL, about 750 ng*hr / mL, about 775 ng*hr / mL, about 800 ng*hr / mL, about 825 ng*hr / mL, about 850 ng*hr / mL, about 875 ng*hr / mL, about 900 ng*hr / mL, about 925 ng*hr / mL, about 950 ng*hr / mL, about 975 ng*hr / mL, about 1000 ng*hr / mL, about 1025 ng*hr / mL, about 1050 ng*hr / mL, about 1075 ng*hr / mL, about 1100 ng*hr / mL, about 1125 ng*hr / mL, about 1150 ng*hr / mL, about 1175 ng*hr / mL, about 1200 ng*hr / mL, about 1225 ng*hr / mL, about 1250 ng*hr / mL, about 1275 ng*hr / mL, about 1300 ng*hr / mL, about 1325 ng*hr / mL, about 1350 ng*hr / mL, about 1375 ng*hr / mL, about 1400 ng*hr / mL, about 1425 ng*hr / mL, about 1450 ng*hr / mL, about 1475 ng*hr / mL, about 1500 ng*hr / mL, about 1525 ng*hr / mL, about 1550 ng*hr / mL, about 1575 ng*hr / mL, about 1600 ng*hr / mL, about 1625 ng*hr / mL, about 1650 ng*hr / mL, about 1675 ng*hr / mL, about 1700 ng*hr / mL, about 1725 ng*hr / mL, about 1750 ng*hr / mL, about 1775 ng*hr / mL, about 1800 ng*hr / mL, about 1825 ng*hr / mL, about 1850 ng*hr / mL, about 1875 ng*hr / mL, about 1900 ng*hr / mL, about 1925 ng*hr / mL, about 1950 ng*hr / mL, about 1975 ng*hr / mL, about 2000 ng*hr / mL, about 2025 ng*hr / mL, about 2050 ng*hr / mL, about 2075 ng*hr / mL, about 2100 ng*hr / mL, about 2125 ng*hr / mL, about 2150 ng*hr / mL, about 2175 ng*hr / mL, or about 2200 ng*hr / mL, including all values and ranges in between. In embodiments, the dose is about 40 μg and the AUC0-infrange is between about 300 hr*ng / L to about 2200 hr*ng / L, for example, about 400 hr*ng / L to about 2000 hr*ng / L, about 400 hr*ng / L to about 1800 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L.

[0202] In embodiments, the dose is about 45 μg and the AUC0-8 range is about 80% to 125% of about 500 hr*ng / L to about 900 hr*ng / L; about 500 hr*ng / L to about 800 hr*ng / L, about 600 hr*ng / L to about 900 hr*ng / L, about 600 hr*ng / L to about 800 hr*ng / L, about 650 hr*ng / L to about 750 hr*ng / L.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0203] In embodiments, the dose is about 45 μg and the AUC0-8 range is between about 500 hr*ng / L to about 900 hr*ng / L, for example, about 500 hr*ng / L to about 800 hr*ng / L, about 600 hr*ng / L to about 900 hr*ng / L, about 600 hr*ng / L to about 800 hr*ng / L, about 650 hr*ng / L to about 750 hr*ng / L.

[0204] In embodiments, the dose is about 60 μg, AUC0-8range is about 80% to 125% of about 500 hr*ng / L to about 1500 hr*ng / L and the AUC0-infrange is about 80% to 125% of about 500 hr*ng / L to about 2000 hr*ng / L.

[0205] In embodiments, the dose is about 60 μg and the AUC0-infis about 500 hr*ng / L to about 3500 hr*ng / L, e.g., about 500 hr*ng / L, about 550 ng*hr / mL, about 600 ng*hr / mL, about 650 ng*hr / mL, about 700 ng*hr / mL, about 750 ng*hr / mL, about 800 ng*hr / mL, about 850 ng*hr / mL, about 900 ng*hr / mL, about 950 ng*hr / mL, about 1000 ng*hr / mL, about 1050 ng*hr / mL, about 1100 ng*hr / mL, about 1150 ng*hr / mL, about 1200 ng*hr / mL, about 1250 ng*hr / mL, about 1300 ng*hr / mL, about 1350 ng*hr / mL, about 1400 ng*hr / mL, about 1450 ng*hr / mL, about 1500 ng*hr / mL, about 1550 ng*hr / mL, about 1600 ng*hr / mL, about 1650 ng*hr / mL, about 1700 ng*hr / mL, about 1750 ng*hr / mL, about 1800 ng*hr / mL, about 1850 ng*hr / mL, about 1900 ng*hr / mL, about 1950 ng*hr / mL, about 2000 ng*hr / mL, about 2050 ng*hr / mL, about 2100 ng*hr / mL, about 2150 ng*hr / mL, about 2200 ng*hr / mL, about 2250 ng*hr / mL, about 2300 ng*hr / mL, about 2350 ng*hr / mL, about 2400 ng*hr / mL, about 2450 ng*hr / mL, about 2500 ng*hr / mL, about 2550 ng*hr / mL, about 2600 ng*hr / mL, about 2650 ng*hr / mL, about 2700 ng*hr / mL, about 2750 ng*hr / mL, about 2800 ng*hr / mL, about 2850 ng*hr / mL, about 2900 ng*hr / mL, about 2950 ng*hr / mL, about 3000 ng*hr / mL, about 3050 ng*hr / mL, about 3100 ng*hr / mL, about 3150 ng*hr / mL, about 3200 ng*hr / mL, about 3250 ng*hr / mL, about 3300 ng*hr / mL, about 3350 ng*hr / mL, about 3400 ng*hr / mL, about 3450 ng*hr / mL, or about 3500 ng*hr / mL, including all values and ranges in between. In embodiments, the dose is about 60 μg and the AUC0-infrange is between about 500 hr*ng / L to about 3500 hr*ng / L, about 500 hr*ng / L to about 3000 hr*ng / L, about 500 hr*ng / L to about 2500 hr*ng / L, about 500 hr*ng / L to about 2000 hr*ng / L, for example, about 600 hr*ng / L to about 1900 hr*ng / L, about 700 hr*ng / L to about 1800 hr*ng / L, about 700 hr*ng / L to about 1700 hr*ng / L, about 700 hr*ng / L to about 1600 hr*ng / L, about 700 hr*ng / L to about 1500 hr*ng / L, about 800 hr*ng / L to about 1500 hr*ng / L, about 900 hr*ng / L to about 1500, about 1000 hr*ng / L to about 1500 hr*ng / L, about 1100 hr*ng / L to about 1500 hr*ng / L, about 1200 hr*ng / L to about 1500 hr*ng / L, about 1300 hr*ng / L to about 1500 hr*ng / L, or about 1400 hr*ng / L to about 1500 hr*ng / L.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0206] In embodiments, the dose is about 60 μg and the AUC0-8 range is between about 500 hr*ng / L to about 1500 hr*ng / L, for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L.

[0207] In embodiments, the dose is about 90 μg, the AUC0-8range is about 80% to 125% of about 500 hr*ng / L to about 1500 hr*ng / L, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L.

[0208] In embodiments, the dose is about 90 μg and the AUC0-inf is about 500 hr*ng / L to about 5000 hr*ng / L, e.g., about 500 hr*ng / L, about 550 ng*hr / mL, about 600 ng*hr / mL, about 650 ng*hr / mL, about 700 ng*hr / mL, about 750 ng*hr / mL, about 800 ng*hr / mL, about 850 ng*hr / mL, about 900 ng*hr / mL, about 950 ng*hr / mL, about 1000 ng*hr / mL, about 1050 ng*hr / mL, about 1100 ng*hr / mL, about 1150 ng*hr / mL, about 1200 ng*hr / mL, about 1250 ng*hr / mL, about 1300 ng*hr / mL, about 1350 ng*hr / mL, about 1400 ng*hr / mL, about 1450 ng*hr / mL, about 1500 ng*hr / mL, about 1550 ng*hr / mL, about 1600 ng*hr / mL, about 1650 ng*hr / mL, about 1700 ng*hr / mL, about 1750 ng*hr / mL, about 1800 ng*hr / mL, about 1850 ng*hr / mL, about 1900 ng*hr / mL, about 1950 ng*hr / mL, about 2000 ng*hr / mL, about 2050 ng*hr / mL, about 2100 ng*hr / mL, about 2150 ng*hr / mL, about 2200 ng*hr / mL, about 2250 ng*hr / mL, about 2300 ng*hr / mL, about 2350 ng*hr / mL, about 2400 ng*hr / mL, about 2450 ng*hr / mL, about 2500 ng*hr / mL, about 2550 ng*hr / mL, about 2600 ng*hr / mL, about 2650 ng*hr / mL, about 2700 ng*hr / mL, about 2750 ng*hr / mL, about 2800 ng*hr / mL, about 2850 ng*hr / mL, about 2900 ng*hr / mL, about 2950 ng*hr / mL, about 3000 ng*hr / mL, about 3050 ng*hr / mL, about 3100 ng*hr / mL, about 3150 ng*hr / mL, about 3200 ng*hr / mL, about 3250 ng*hr / mL, about 3300 ng*hr / mL, about 3350 ng*hr / mL, about 3400 ng*hr / mL, about 3450 ng*hr / mL, about 3500 ng*hr / mL, about 3550 ng*hr / mL, about 3600 ng*hr / mL, about 3650 ng*hr / mL, about 3700 ng*hr / mL, about 3750 ng*hr / mL, about 3800 ng*hr / mL, about 3850 ng*hr / mL, about 3900 ng*hr / mL, about 3950 ng*hr / mL, about 4000 ng*hr / mL, about 4050 ng*hr / mL, about 4100 ng*hr / mL, about 4150 ng*hr / mL, about 4200 ng*hr / mL, about 4250 ng*hr / mL, about 4300 ng*hr / mL, about 4350 ng*hr / mL, about 4400 ng*hr / mL, about 4450 ng*hr / mL, about 4500 ng*hr / mL, about 4550 ng*hr / mL, about 4600 ng*hr / mL, about 4650 ng*hr / mL, about 4700 ng*hr / mL, about 4750 ng*hr / mL, about 4800 ng*hr / mL, about 4850Attorney Docket No.: BXTI-059 / 02WO 332712-2423 ng*hr / mL, about 4900 ng*hr / mL, about 4950 ng*hr / mL, or about 5000 ng*hr / mL, including all values and ranges in between. In embodiments, the dose is about 90 μg and the AUC0- inf range is between about 500 hr*ng / L to about 5000 hr*ng / L, for example, about 500 hr*ng / L to about 4500 hr*ng / L, about 500 hr*ng / L to about 4000 hr*ng / L, about 500 hr*ng / L to about 3500 hr*ng / L, about 500 hr*ng / L to about 3000 hr*ng / L, about 500 hr*ng / L to about 2500 hr*ng / L, about 500 hr*ng / L to about 2000 hr*ng / L, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L.

[0209] In embodiments, the dose is about 90 μg and the AUC0-8range is between about 500 hr*ng / L to about 1500 hr*ng / L, for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L.

[0210] Advantageously, the dose provides a Cmax in a range of about 50 ng / L to about 500 ng / L; for example, about 50 ng / L to about 400 ng / L, preferably about 50 ng / L to about 300 ng / L.

[0211] Advantageously, the dose provides a Cmax in a range of about 50 ng / L to about 500 ng / L; for example, about 50 ng / L to about 400 ng / L, preferably about 50 ng / L to about 300 ng / L. Advantageously, the dose provides an AUC0-8in a range of about 200 hr*ng / L to about 1500 hr*ng / L; for example, about 200 hr*ng / L to about 1250 hr*ng / L, about 200 hr*ng / L to about 1000 hr*ng / L, about 200 hr*ng / L to about 750 hr*ng / L, about 200 hr*ng / L to about 500 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, about 500 hr*ng / L to about 1250 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 500 hr*ng / L to about 750 hr*ng / L, about 750 hr*ng / L to about 1500 hr*ng / L, about 750 hr*ng / L to about 1250 hr*ng / L, about 750 hr*ng / L to about 1000 hr*ng / L, about 1000 hr*ng / L to about 1500 hr*ng / L. In embodiments, the dose provides an AUC0-8 of about 200 hr*ng / L, about 300 hr*ng / L, about 400 hr*ng / L, about 500 hr*ng / L, about 600 hr*ng / L, about 700 hr*ng / L, about 800 hr*ng / L, about 900 hr*ng / L, about 1000 hr*ng / L, about 1100 hr*ng / L, about 1200 hr*ng / L, about 1300 hr*ng / L, about 1400 hr*ng / L, or about 1500 hr*ng / L. Advantageously, the dose provides an AUC0-inf in a range of about 200 hr*ng / L to about 2200 hr*ng / L, about 200 hr*ng / L to about 2000 hr*ng / L; for example, about 300 hr*ng / L to about 1900 hr*ng / L, about 400 hr*ng / L to about 1800 hr*ng / L, about 500 hr*ng / L to about 1700 hr*ng / L, about 500 hr*ng / L to about 1600 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, about 600 hr*ng / L to about 1500 hr*ng / L, about 700 hr*ng / LAttorney Docket No.: BXTI-059 / 02WO 332712-2423 to about 1500 hr*ng / L. In embodiments, the dose provides an AUC0-inf of about 200 hr*ng / L, about 300 hr*ng / L, about 400 hr*ng / L, about 500 hr*ng / L, about 600 hr*ng / L, about 700 hr*ng / L, about 750 hr*ng / L, about 800 hr*ng / L, about 850 hr*ng / L, about 900 hr*ng / L, about 950 hr*ng / L, about 1000 hr*ng / L, about 1050 hr*ng / L, about 1100 hr*ng / L, about 1150 hr*ng / L, about 1200 hr*ng / L, about 1250 hr*ng / L, about 1300 hr*ng / L, about 1350 hr*ng / L, about 1400 hr*ng / L, about 1450 hr*ng / L, or about 1500 hr*ng / L. In embodiments, the Cmax, AUC0-inf,and AUC0-8is preferably 80% to 125% of these ranges and values.

[0212] In embodiments, the dose is about 30 μg, and the Cmaxis about 30 ng / L to about 150 ng / L, e.g., about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 65 ng / L, about 70 ng / L, about 75 ng / L, about 80 ng / L, about 85 ng / L, about 90 ng / L, about 95 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, or about 150 ng / L, including all values and ranges in between.

[0213] In embodiments, the dose is about 30 μg, the Cmax range is about 80% to 125% of about 50 ng / L to about 150 ng / L, about 50 ng / L to about 125 ng / L, about 50 ng / L to about 100 ng / L, about 50 ng / L to about 85 ng / L, about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L.

[0214] In embodiments, the dose is about 30 μg and the Cmax range is between about 50 ng / L to about 150 ng / L, for example, about 50 ng / L to about 125 ng / L, about 50 ng / L to about 100 ng / L, about 50 ng / L to about 75 ng / L, about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L. In embodiments, the Cmaxand AUC0-8is preferably 80% to 125% of these ranges.

[0215] In embodiments, the dose is about 30 μg and the Cmaxrange is between about 50 ng / L to about 150 ng / L, for example, about 50 ng / L to about 125 ng / L, about 50 ng / L to about 100 ng / L, about 50 ng / L to about 85 ng / L, about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L. In embodiments, the Cmax and AUC0-inf is preferably 80% to 125% of these ranges.

[0216] In embodiments, the dose is about 40 μg, and the Cmax is about 40 ng / L to about 200 ng / L, e.g., about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 65 ng / L, about 70 ng / L, about 75 ng / L, about 80 ng / L, about 85 ng / L, about 90 ng / L, about 95 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 155 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180Attorney Docket No.: BXTI-059 / 02WO 332712-2423 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, or about 200 ng / L, including all values and ranges in between.

[0217] In embodiments, the dose is about 40 μg and the Cmax range is about 80% to 125% of 50 ng / L to about 250 ng / L, for example, about 50 ng / L to about 225 ng / L, about 50 ng / L to about 200 ng / L, about 100 ng / L to about 180 ng / L, about 100 ng / L to about 150 ng / L, about 150 ng / L to about 200 ng / L.

[0218] In embodiments, the dose is about 40 μg and the Cmaxrange is between about 50 ng / L to about 250 ng / L, for example, about 50 ng / L to about 225 ng / L, about 50 ng / L to about 200 ng / L, about 100 ng / L to about 180 ng / L, about 100 ng / L to about 150 ng / L, about 150 ng / L to about 200 ng / L. In embodiments, the Cmaxand AUC0-infis preferably 80% to 125% of these ranges and values.

[0219] In embodiments, the dose is about 45 μg, Cmax range is about 80% to 125% of about 75 ng / L to about 175 ng / L, about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L.

[0220] In embodiments, the dose is about 45 μg and the Cmax range is between about 75 ng / L to about 175 ng / L, for example, about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L. In embodiments, the Cmax and AUC0-8 is preferably 80% to 125% of these ranges and values.

[0221] In embodiments, the dose is about 60 μg, and the Cmaxis about 70 ng / L to about 300 ng / L, e.g., about 70 ng / L, about 75 ng / L, about 80 ng / L, about 85 ng / L, about 90 ng / L, about 95 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 155 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 205 ng / L, about 210 ng / L, about 215 ng / L, about 220 ng / L, about 225 ng / L, about 230 ng / L, about 235 ng / L, about 240 ng / L, about 245 ng / L, about 250 ng / L, about 255 ng / L, about 260 ng / L, about 265 ng / L, about 270 ng / L, about 275 ng / L, about 280 ng / L, about 285 ng / L, about 290 ng / L, about 295 ng / L, or about 300 ng / L, including all values and ranges in between.

[0222] In embodiments, the dose is about 60 μg , Cmax range is about 80% to 125% of about 100 ng / L to about 300 ng / L, about 100 ng / L to about 250 ng / L, about 100 ng / L to about 225 ng / L, about 100 ng / L to about 200 ng / L, about 100 ng / L to about 150 ng / L, about 150 ng / L to about 250 ng / L, about 150 ng / L to about 200 ng / L.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0223] In embodiments, the dose is about 60 μg and the Cmax range is between about 100 ng / L to about 250 ng / L, for example, about 100 ng / L to about 225 ng / L, about 100 ng / L to about 200 ng / L, about 150 ng / L to about 250 ng / L, about 150 ng / L to about 200 ng / L. In embodiments, the Cmaxand AUC0-8is preferably 80% to 125% of these ranges and values.

[0224] In embodiments, the dose is about 60 μg and the Cmaxrange is between about 100 ng / L to about 300 ng / L, for example, about 100 ng / L to about 250 ng / L, about 100 ng / L to about 225 ng / L, about 100 ng / L to about 200 ng / L, about 100 ng / L to about 150 ng / L, about 150 ng / L to about 250 ng / L, about 150 ng / L to about 200 ng / L. In embodiments, the Cmaxand AUC0-infis preferably 80% to 125% of these ranges and values.

[0225] In embodiments, the dose is about 90 μg, the Cmaxrange is about 80% to 125% of about 100 ng / L to about 400 ng / L, 100 ng / L to about 350 ng / L, about 100 ng / L to about 300 ng / L, about 200 ng / L to about 400 ng / L, about 200 ng / L to about 350 ng / L .

[0226] In embodiments, the dose is about 90 μg and the Cmax range is between about 100 ng / L to about 400 ng / L, for example, about 100 ng / L to about 350 ng / L, about 100 ng / L to about 300 ng / L, about 200 ng / L to about 400 ng / L, about 200 ng / L to about 350 ng / L. In embodiments, the Cmax and AUC0-8 is preferably 80% to 125% of these ranges and values.

[0227] In embodiments, when the dose is 30μg, the mean plasma concentrations values are in the range of about 20 ng / L to about 50 ng / L (for example about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L and about 45 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6. In embodiments, the Cmaxvalues are preferably 80% to 125% of these ranges and values.

[0228] In embodiments, when the dose is 60μg, the mean plasma concentrations are in the range of about 25 ng / L to about 150 ng / L (for example about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6. In embodiments, the mean plasma concentrations are preferably 80% to 125% of these ranges and values.

[0229] In embodiments, the dose is about 90 μg, and the Cmax is about 100 ng / L to about 500 ng / L, e.g., about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 155 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, aboutAttorney Docket No.: BXTI-059 / 02WO 332712-2423 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 205 ng / L, about 210 ng / L, about 215 ng / L, about 220 ng / L, about 225 ng / L, about 230 ng / L, about 235 ng / L, about 240 ng / L, about 245 ng / L, about 250 ng / L, about 255 ng / L, about 260 ng / L, about 265 ng / L, about 270 ng / L, about 275 ng / L, about 280 ng / L, about 285 ng / L, about 290 ng / L, about 295 ng / L, about 300 ng / L, about 305 ng / L, about 310 ng / L, about 315 ng / L, about 320 ng / L, about 325 ng / L, about 330 ng / L, about 335 ng / L, about 340 ng / L, about 345 ng / L, about 350 ng / L, about 355 ng / L, about 360 ng / L, about 365 ng / L, about 370 ng / L, about 375 ng / L, about 380 ng / L, about 385 ng / L, about 390 ng / L, about 395 ng / L, about 400 ng / L, about 405 ng / L, about 410 ng / L, about 415 ng / L, about 420 ng / L, about 425 ng / L, about 430 ng / L, about 435 ng / L, about 440 ng / L, about 445 ng / L, about 450 ng / L, about 455 ng / L, about 460 ng / L, about 465 ng / L, about 470 ng / L, about 475 ng / L, about 480 ng / L, about 485 ng / L, about 490 ng / L, about 495 ng / L, or about 500 ng / L, including all values and ranges in between.

[0230] In embodiments, when the dose is 90μg, the mean plasma concentrations are in the range of about 30 ng / L to about 150 ng / L (for example about 30 ng / L, 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L or about 145 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6. In embodiments, the Cmaxvalues are preferably 80% to 125% of these ranges and values.

[0231] In embodiments, when the dose is 120 μg, the mean plasma concentrations are in the range of about 50 ng / L to about 200 ng / L (for example, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L about 195 ng / L, or about 200 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6. In embodiments, the mean plasma concentrations values are preferably 80% to 125% of these ranges and values.

[0232] In embodiments, when the dose is 180 μg, the mean plasma concentrations are in the range of about 100 ng / L to about 450 ng / L (for example, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, aboutAttorney Docket No.: BXTI-059 / 02WO 332712-2423 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 400 ng / L, about 425 ng / L, or about 450 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6. In embodiments, the Cmaxvalues are preferably 80% to 125% of these ranges and values.

[0233] In embodiments, when the dose is 240 μg, the mean plasma concentrations are in the range of about 100 ng / L to about 400 ng / L (for example, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 395 ng / L, about 400 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6. In embodiments, the Cmax values are preferably 80% to 125% of these ranges and values.

[0234] In embodiments, when the dose is 30μg, the mean plasma concentrations are in the range of about 10 ng / L to about 100 ng / L (for example about 10 ng / L, about 15 ng / L, about 20 ng / L, about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 80 ng / L, about 90 ng / L, about 95 ng / L, or about 95 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0235] In embodiments, when the dose is 60μg, the mean plasma concentrations are in the range of about 10 ng / L to about 150 ng / L (for example about 10 ng / L, about 15 ng / L, about 20 ng / L, about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, or about 150 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0236] In embodiments, when the dose is 90μg, the mean plasma concentrations are in the range of about 25 ng / L to about 150 ng / L (for example about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70Attorney Docket No.: BXTI-059 / 02WO 332712-2423 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, or about 150 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0237] In embodiments, when the dose is 120 μg, the mean plasma concentrations are in the range of about 50 ng / L to about 200 ng / L (for example, about 55 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L and about 195 ng / L, or about 200 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0238] In embodiments, when the dose is 180 μg, the mean plasma concentrations are in the range of about 100 ng / L to about 400 ng / L (for example, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, or about 400 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0239] In embodiments, when the dose is 240 μg, the mean plasma concentrations are in the range of about 50 ng / L to about 500 ng / L (for example, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 80 ng / L, about 90 ng / L, about 95 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 395 ng / L, about 400 ng / L, about 425 ng / L, about 450 ng / L, about 460 ng / L, about 465 ng / L, about 475 ng / L, about 480 ng / L, about 485 ng / L, about 490 ng / L, about 495 ng / L, or about 500 ng / L, including all values and ranges in between) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0240] In embodiments, the subject is about 1 to about 100 years old, e.g., about 1 year old, about 2 years old, about 3 years old, about 4 years old, about 5 years old, about 6 years old, about 7 years old, about 8 years old, about 9 years old, about 10 years old, about 11 years old, about 12 years old, about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years old, about 18 years old, about 19 years old, about 20 years old, about 25 years old, about 30 years old, about 35 years old, about 40 years old, about 45 years old, about 50 years old, about 55 years old, about 60 years old, about 65 years old, about 70 years old, about 75 years old, about 80 years old, about 85 years old, about 90 years old, about 95 years old, about 100 years old, including all values and ranges in between.

[0241] In embodiments, the subject is about 1 to about 18 years old, e.g., about 1 year old, about 2 years old, about 3 years old, about 4 years old, about 5 years old, about 6 years old, about 7 years old, about 8 years old, about 9 years old, about 10 years old, about 11 years old, about 12 years old, about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years old, about 18 years old, including all values and ranges in between.

[0242] In embodiments, the subject is about 10 to about 17 years old, e.g., about 10 years old, about 11 years old, about 12 years old, about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years, including all values and ranges in between.

[0243] In embodiments, the subject is about 13 to about 17 years old, e.g., about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years old, including all values and ranges in between.

[0244] In embodiments, the subject is about 18 years old to about 64 years old, e.g., about 18 years old, about 19 years old, about 20 years old, about 21 years old, about 22 years old, about 23 years old, about 24 years old, about 25 years old, about 26 years old, about 27 years old, about 28 years old, about 29 years old, about 30 years old, about 31 years old, about 32 years old, about 33 years old, about 34 years old, about 35 years old, about 36 years old, about 37 years old, about 38 years old, about 39 years old, about 40 years old, about 41 years old, about 42 years old, about 43 years old, about 44 years old, about 45 years old, about 46 years old, about 47 years old, about 48 years old, about 49 years old, about 50 years old, about 51 years old, about 52 years old, about 53 years old, about 54 years old, about 55 years old, about 56 years old, about 57 years old, about 58 years old, about 59 years old, about 60 years old, about 61 years old, about 62 years old, about 63 years old, about 64 years old, including all values and ranges in between.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0245] In embodiments, the subject is about 21 years old to about 50 years old, e.g., about 21 years old, about 22 years old, about 23 years old, about 24 years old, about 25 years old, about 26 years old, about 27 years old, about 28 years old, about 29 years old, about 30 years old, about 31 years old, about 32 years old, about 33 years old, about 34 years old, about 35 years old, about 36 years old, about 37 years old, about 38 years old, about 39 years old, about 40 years old, about 41 years old, about 42 years old, about 43 years old, about 44 years old, about 45 years old, about 46 years old, about 47 years old, about 48 years old, about 49 years old, about 50 years old, including all values and ranges in between.

[0246] In embodiments, the subject is older than 64 years old. In embodiments, the subject is about 65 years old to about 80 years old, e.g., about 65 years old, about 66 years old, about 67 years old, about 68 years old, about 69 years old, about 70 years old, about 71 years old, about 72 years old, about 73 years old, about 74 years old, about 75 years old, about 76 years old, about 77 years old, about 78 years old, about 79 years old, about 80 years old, including all values and ranges in between. In embodiments, the subject is about 75 years old to about 80 years old, e.g., about 75 years old, about 76 years old, about 77 years old, about 78 years old, about 79 years old, about 80 years old, including all values and ranges in between. In embodiments, the subject is older than 80 years old, e.g., about 81 years old, about 82 years old, about 83 years old, about 84 years old, about 85 years old, about 86 years old, about 87 years old, about 88 years old, about 89 years old, about 90 years old, about 91 years old, about 92 years old, about 93 years old, about 94 years old, about 95 years old, about 96 years old, about 97 years old, about 98 years old, about 99 years old, about 100 years old, including all values and ranges in between.

[0247] In order to achieve the desired dose, dexmedetomidine may be oromucosally administered as a single unit dose, as multiple unit doses, or as a fraction of one or more unit doses (e.g. half of a unit dose), or a combination thereof. By way of example, to administer 120 ^g of dexmedetomidine, a patient may be administered a single unit dose of 120 ^g of dexmedetomidine, two unit doses of 60 ^g of dexmedetomidine, or one half of a unit dose of 240 ^g of dexmedetomidine. In embodiments, dexmedetomidine is administered as a film. Thus, half doses can be achieved by cutting the film in half, for example, cutting a 120 ^g or 180 ^g film in half to achieve a 60 ^g dose and a 90 ^g dose, respectively.

[0248] In embodiments, the dose may be administered multiple times (e.g. one to four times) at an appropriate dosing interval (e.g. every 0.5 hours) to produce a desired effect; for example, a 20 μg unit dose or a 60 μg unit dose can be administered four times at a dosing interval ofAttorney Docket No.: BXTI-059 / 02WO 332712-2423 every 0.5 hours within 6 hours of the first dose to produce the effect of a 80 μg dose and a 240 μg dose, respectively. In embodiments, each dosage unit may be administered one to two times at an appropriate dosing interval (every 12 hours) to produce a desired effect; for example, a 120 μg unit is administered two times in a day at an interval of 12 hours to produce the effect of a 240 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., every 1 to 6 hours) to produce a desired effect; for example, a 120 μg dose (starting dose) is administered followed by an additional seven doses in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 960 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., every 1 to 6 hours) to produce a desired effect; for example, a 180 μg dose (starting dose) is administered followed by an additional six doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 900 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (for e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 240 μg dose (starting dose) is administered followed by an additional six doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 960 μg dose. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (for e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 300 μg dose (starting dose) is administered followed by additional five doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 900 μg dose. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered oromucosally (e.g., sublingually or buccally) as a film.

[0249] In embodiments, the dosage of dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered one to six times a day.

[0250] In embodiments, the dosage of dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered one to four times a day. In embodiments, the dosage of dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered twice a day.

[0251] In embodiments, dexmedetomidine is oromucosally (e.g. sublingually or buccally) administered one to ten times a day at an appropriate dosing interval (e.g. after every 30 minutes) within 6 hours of first dose to produce a desired effect; for example, a 20 μg unit dose is administered four times at a dosing interval of every 30 minutes within 6 hours of the first dose to produce the effect of a 80 μg dose; or a 60 μg unit dose is administered four times at aAttorney Docket No.: BXTI-059 / 02WO 332712-2423 dosing interval of every 30 minutes within 6 hours of the first dose to produce the effect of a 240 μg. In embodiments, each dosage unit may be administered one to two times at an appropriate dosing interval (e.g., at least 12 hours apart) to produce a desired effect; for example, a 120 μg unit is administered two times in a day at an interval of 12 hours apart. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 120 μg dose (starting dose) is administered an additional seven times in a day at an interval of about 1 to about 6 hours to produce a maximum cumulative dose of a 960 μg. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., at least 1 to 6 hours) to produce a desired effect; for example, a 180 μg dose (starting dose) is administered followed by an additional six doses of 120 μg at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 900 μg. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 240 μg dose (starting dose) is administered followed by an additional six doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of a 960 μg. In embodiments, each dosage unit may be administered one to ten times at an appropriate dosing interval (e.g., of at least 1 to 6 hours) to produce a desired effect; for example, a 300 μg dose (starting dose) is administered followed by an additional five doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of 900 μg.

[0252] In embodiments, a lower dosage is administered in the morning (for example, from about 10 μg to about 60 μg) and a higher dosage is administered in the evening or night (for example, the doses above 60 μg).

[0253] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof may be administered orally, oromucosally (e.g., sublingually, buccally), intravenously, intramuscularly, subcutaneously, topically, transdermally, intratracheally, intraperitoneally, intraorbitally, by implantation, by inhalation, intrathecally, intraventricularly or intranasally.

[0254] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered to the subject by the sublingual, buccal, oral, intranasal or parenteral route. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered by the sublingual or buccal route.

[0255] In embodiments, the present disclosure is a method of treating agitation or signs of agitation in a human subject with dementia. In embodiments, the present disclosure is a methodAttorney Docket No.: BXTI-059 / 02WO 332712-2423 of treating agitation or signs of agitation in a human subject with dementia, without also inducing significant sedation.

[0256] In embodiments, the present disclosure is a method of treating agitation or signs of agitation in a human subject with dementia, without also inducing significant sedation, comprising administering from about 30 μg to about 180 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the subject with dementia has Alzheimer’s disease. In embodiments, 30 μg, 40 μg, 60 μg or 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof is administered as a single dose per day. In embodiments, an additional dose (e.g., 10 μg, 20 μg, 30 μg or 40 μg) is administered after a suitable period of time (e.g. 2, 4, 6, 8, or 12 hours) in the event of persistent or recurrent agitation. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered as a unit dose comprising about 30 μg to about 90 μg from 1 to 6 times per day. For example, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered 1, 2, 3, 4, 5, or 6 times every 2 hours, every 4 hours, every 6 hours, every 8 hours, every 10 hours, or every 12 hours. In embodiments, a unit dose comprising about 30 μg to 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof is administered one to six times per day at an interval of 2 hours with the provision of maximum of three doses within 12 hours of first dose. In embodiments, each unit dose containing about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof may be taken one to four times per day at an interval of 2 hours with the provision of maximum of two doses within 12 hours of first dose. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered oromucosally (e.g., sublingually or buccally) as a film. In embodiments, the dose is achieved by cutting a film in half to deliver a half-dose, e.g., a 60 μg dose may be administered with half of a second 60 μg dose (30 μg) to make a 90 μg dose.

[0257] In embodiments, provided herein are methods of treating agitation associated with dementia in patients in need thereof comprising administering a composition comprising dexmedetomidine or pharmaceutically acceptable salt thereof to the oral mucosa of the patient at least twice including a first dosing and a repeated dosing, wherein the first dosing results in a first reduction of agitation and the repeated dosing results in a repeated reduction of agitation, and wherein the repeated reduction of agitation is similar to the first reduction of agitation.

[0258] In embodiments, the first reduction of agitation and the second reduction of agitation are measured in PEC Total Scores. In embodiments, the first reduction of agitation and theAttorney Docket No.: BXTI-059 / 02WO 332712-2423 second reduction of agitation are measured in PAS scores. In embodiments, the first reduction of agitation and the second reduction of agitation are measured in CGI-I.

[0259] In embodiments, the similar reductions of agitation are defined as the PEC Total Score changes within 0.1, 0.2, 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, or 5.0 from each other.

[0260] In embodiments, the similar reductions of agitation are defined as the PAS score changes within 0.1, 0.2, 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, or 5.0 from each other.

[0261] In embodiments, the similar reductions of agitation are defined as the CGI-I Score changes within 0.1, 0.2, 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, or 5.0 from each other.

[0262] In embodiments, the similar reductions of agitation are defined as the percent responder rates measured in PEC Total Scores within 1%, 2%, 3%, 4%, 5%, 6%, 8%, 10%, 15%, 20%, or 30% from each other.

[0263] In embodiments, the similar reductions of agitation are defined as the percent responder rates measured in PAS scores within 1%, 2%, 3%, 4%, 5%, 6%, 8%, 10%, 15%, 20%, or 30% from each other.

[0264] In embodiments, the similar reductions of agitation are defined as the percent responder rates measured in CGI-I scores within 1%, 2%, 3%, 4%, 5%, 6%, 8%, 10%, 15%, 20%, or 30% from each other.

[0265] In embodiments, a repeat dose cannot be administered until 2 or more hours have passed after the initial dose and after the collection of the 2 hour initial dose assessments. In embodiments, a repeat dose must occur within 12 hours of the initial dose and be based on a PEC change from baseline of <40%. In some embodiments, the maximum number of repeat doses per subject is 1.

[0266] In embodiments, the present disclosure is a method of treating agitation or signs of agitation in a human subject with dementia, without also inducing significant sedation, comprising administering from about 30 μg to about 180 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is acute agitation. In embodiments, the present disclosure is a method of treating agitation or signs of agitation in a human subject with dementia, without also inducing significant sedation, comprising administering from about 30 μg to about 180 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is chronic agitation.

[0267] The present disclosure provides methods of treating agitation in elderly patients having dementia comprising administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the patient in an agitated state.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0268] The data showed that doses higher than about 90 μg have negative consequences in elderly dementia patients and are not used; for example, higher doses may interact with blood pressure medications to cause unacceptable drops in blood pressure, bradycardia, and dizziness; syncope can occur in severe cases. In certain circumstances, however, doses above about 90 μg may be used in elderly dementia patients when agitated provided that the patient is not at risk for hypotension side effects. This disclosure thus provides for administering doses higher than about 90 μg to patients who have not received a hypertension treatment for at least 10 hours, at least 24 hours, at least 48 hours, or at least a week, prior to administering dexmedetomidine. Such higher doses may be about 100 μg to about 130 μg; for example, about 100 μg, about 110 μg, about 120 μg, or about 130 μg. Advantageously, dexmedetomidine may be used to replace the hyper-tension-treating drug while treating both agitation and the hyper- tension.

[0269] In embodiments, the dexmedetomidine may be administered to the agitated elderly dementia patients via a route that avoids first-pass metabolism; for example, intravenous, intramuscular, subcutaneous, transdermal. Preferably delivery is oromucosal; for example, buccal or sub-lingual. In embodiments, the dosage form is a film. Suitable films are described in US Patent No. 10,792,246, which is hereby incorporated by reference in its entirety for all purposes. In embodiments, the elderly patient is 55 years old or older, e.g., about 55 years old, about 56 years old, about 57 years old, about 58 years old, about 59 years old, about 60 years old, about 61 years old, about 62 years old, about 63 years old, about 64 years old, about 65 years old, about 66 years old, about 67 years old, about 68 years old, about 69 years old, about 70 years old, about 71 years old, about 72 years old, about 73 years old, about 74 years old, about 75 years old, about 76 years old, about 77 years old, about 78 years old, about 79 years old, about 80 years old, about 81 years old, about 82 years old, about 83 years old, about 84 years old, about 85 years old, about 86 years old, about 87 years old, about 88 years old, about 89 years old, about 90 years old, about 91 years old, about 92 years old, about 93 years old, about 94 years old, about 95 years old, about 96 years old, about 97 years old, about 98 years old, about 99 years old, about 100 years old. In embodiments, the elderly patient is about 65 years old or older. In embodiments, the elderly patient is about 70 years old or older. In embodiments, the elderly patient is about 75 to about 80 years old. In embodiments, the elderly patient is about 80 years old or older. In embodiments, the elderly patient has both dementia and Alzheimer’s disease.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0270] In embodiments, the agitation is acute agitation. In embodiments, the agitation is chronic agitation.

[0271] In embodiments, the present disclosure provides methods of treating agitation in elderly patients having dementia comprising administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the patient in an agitated state, wherein the dose of dexmedetomidine is about 30 μg to about 90 μg (e.g.40 μg); wherein the Cmaxis about 50 ng / L to about 300 ng / L; wherein the route of administration is oromucosal, intravenous, intramuscular, subcutaneous, or transdermal; and wherein the elderly patient is 65 years old or older. For example, the dose may be about 30 μg to about 90 μg; for example, about 30 μg to about 60 μg; about 60 μg to about 90 μg, about 30 μg to about 45 μg or about 30 μg to about 40 μg. In embodiments, the dose may be about 30 μg, about 40 μg, about 45 μg, about 50 μg, about 60 μg, about 75 μg, about 80 μg or about 90 μg.

[0272] In embodiments , the dose provides an AUC0-8 in a range of about 200 hr*ng / L to about 1500 hr*ng / L; for example, , about 200 hr*ng / L to about 1250 hr*ng / L, about 200 hr*ng / L to about 1000 hr*ng / L, about 200 hr*ng / L to about 750 hr*ng / L, about 200 hr*ng / L to about 500 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, about 500 hr*ng / L to about 1250 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 500 hr*ng / L to about 750 hr*ng / L, about 750 hr*ng / L to about 1500 hr*ng / L, about 750 hr*ng / L to about 1250 hr*ng / L, about 750 hr*ng / L to about 1000 hr*ng / L, or about 1000 hr*ng / L to about 1500 hr*ng / L. In embodiments, the dose provides an AUC0-8of about 200 hr*ng / L, about 300 hr*ng / L, about 400 hr*ng / L, about 500 hr*ng / L, about 600 hr*ng / L, about 700 hr*ng / L, about 800 hr*ng / L, about 900 hr*ng / L, about 1000 hr*ng / L, about 1100 hr*ng / L, about 1200 hr*ng / L, about 1300 hr*ng / L, about 1400 hr*ng / L, or about 1500 hr*ng / L.

[0273] In embodiments, the dose provides an AUC0-infin a range of about 200 hr*ng / L to about 5000 hr*ng / L, about 200 hr*ng / L to about 3500 hr*ng / L, about 200 hr*ng / L to about 2200 hr*ng / L, about 200 hr*ng / L to about 2000 hr*ng / L; for example, about 300 hr*ng / L to about 1900 hr*ng / L, about 400 hr*ng / L to about 1800 hr*ng / L, about 500 hr*ng / L to about 1700 hr*ng / L, about 500 hr*ng / L to about 1600 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, about 600 hr*ng / L to about 1500 hr*ng / L, about 700 hr*ng / L to about 1500 hr*ng / L. In embodiments, the dose provides an AUC0-inf of about 200 hr*ng / L, about 300 hr*ng / L, about 400 hr*ng / L, about 500 hr*ng / L, about 600 hr*ng / L, about 700 hr*ng / L, about 750 hr*ng / L, about 800 hr*ng / L, about 850 hr*ng / L, about 900 hr*ng / L, about 950 hr*ng / L, about 1000 hr*ng / L, about 1050 hr*ng / L, about 1100 hr*ng / L, about 1150 hr*ng / L, about 1200 hr*ng / L,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 about 1250 hr*ng / L, about 1300 hr*ng / L, about 1350 hr*ng / L, about 1400 hr*ng / L, about 1450 hr*ng / L, about 1500 hr*ng / L, about 1600 hr*ng / L, about 1700 hr*ng / L, about 1800 hr*ng / L, about 1900 hr*ng / L, about 2000 hr*ng / L, about 2100 hr*ng / L, about 2200 hr*ng / L, about 2300 hr*ng / L, about 2400 hr*ng / L, about 2500 hr*ng / L, about 2600 hr*ng / L, about 2700 hr*ng / L, about 2800 hr*ng / L, about 2900 hr*ng / L, about 3000 hr*ng / L, about 3100 hr*ng / L, about 3200 hr*ng / L, about 3300 hr*ng / L, about 3400 hr*ng / L, about 3500 hr*ng / L, about 2200 hr*ng / L, about 3600 hr*ng / L, about 3700 hr*ng / L, about 3800 hr*ng / L, about 3900 hr*ng / L, about 4000 hr*ng / L, about 4100 hr*ng / L, about 4200 hr*ng / L, about 4300 hr*ng / L, about 4400 hr*ng / L, about 4500 hr*ng / L, about 4600 hr*ng / L, about 4700 hr*ng / L, about 4800 hr*ng / L, about 4900 hr*ng / L or about 5000 hr*ng / L, including all values and ranges in between. In embodiments, the Cmax and AUC0-8 is preferably 80% to 125% of these ranges and values. In embodiments, the Cmax and AUC0-inf is preferably 80% to 125% of these ranges and values. The ranges obtained using these doses of dexmedetomidine were not expected based on prior studies. Indeed, compared to schizophrenia patients, the Cmax data is about 38% higher and the AUC data is about 55% higher.

[0274] In embodiments, the present disclosure provides methods of treating an acute agitation episode in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide a dexmedetomidine AUC0-8to a range between about 200 hr*ng / L to about 1500 hr*ng / L; wherein the Cmaxis about 50 ng / L to about 300 ng / L; wherein the patient is 65 years old or older; wherein the route of administration is selected from oromucosal, intravenous, intramuscular, subcutaneous, and transdermal. In embodiments, the present disclosure provides methods of treating an acute agitation episode in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide a dexmedetomidine AUC0-infto a range between about 200 hr*ng / L to about 2200 hr*ng / L; wherein the Cmax is about 50 ng / L to about 300 ng / L; wherein the patient is 65 years old or older; wherein the route of administration is selected from oromucosal, intravenous, intramuscular, subcutaneous, and transdermal. In embodiments, the method of treating an acute agitation episode in an elderly dementia patient, comprises administering to the patient about 30 μg to about 90 μg dexmedetomidine, or a pharmaceutically acceptable salt thereof, e.g. about 30 μg, about 40 μg, about 45 μg, about 50 μg, about 60 μg, about 75 μg, about 80 μg or about 90 μg. In embodiments, the method of treating an acute agitation episode in an elderly dementia patient, comprises administering toAttorney Docket No.: BXTI-059 / 02WO 332712-2423 the patient about 30 μg dexmedetomidine, or a pharmaceutically acceptable salt thereof. In embodiments, the method of treating an acute agitation episode in an elderly dementia patient, comprises administering to the patient about 40 μg dexmedetomidine, or a pharmaceutically acceptable salt thereof. In embodiments, the method of treating an acute agitation episode in an elderly dementia patient, comprises administering to the patient about 60 μg dexmedetomidine, or a pharmaceutically acceptable salt thereof. In embodiments, the patient is not significantly sedated within about 60 minutes after administration.

[0275] In embodiments, the disclosure provides methods of treating chronic agitation in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide a dexmedetomidine AUC0-8 to a range between about 200 hr*ng / L to about 1500 hr*ng / L; wherein the Cmax is about 50 ng / L to about 300 ng / L; wherein the patient is 65 years old or older; wherein the route of administration is selected from oromucosal, intravenous, intramuscular, subcutaneous, and transdermal. In embodiments, the present disclosure provides methods of treating chronic agitation in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide a dexmedetomidine AUC0-inf to a range between about 200 hr*ng / L to about 2200 hr*ng / L; wherein the Cmax is about 50 ng / L to about 300 ng / L; wherein the patient is 65 years old or older; wherein the route of administration is selected from oromucosal, intravenous, intramuscular, subcutaneous, and transdermal. In embodiments, the method of treating chronic agitation in an elderly dementia patient, comprises administering to the patient about 30 μg to about 90 μg dexmedetomidine, or a pharmaceutically acceptable salt thereof, e.g. about 30 μg, about 40 μg, about 45 μg, about 50 μg, about 60 μg, about 75 μg, about 80 μg or about 90 μg. In embodiments, the method of treating chronic agitation in an elderly dementia patient, comprises administering to the patient about 30 μg dexmedetomidine, or a pharmaceutically acceptable salt thereof. In embodiments, the patient is not significantly sedated within about 60 minutes after administration.

[0276] In embodiments, the present disclosure provides methods of treating chronic agitation in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide a dexmedetomidine AUC0-inf to a range between about 200 hr*ng / L to about 3500 hr*ng / L; wherein the Cmax is about 50 ng / L to about 300 ng / L; wherein the patient is 65 years old or older; wherein the route of administration is selected from oromucosal, intravenous,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 intramuscular, subcutaneous, and transdermal. In embodiments, the present disclosure provides methods of treating chronic agitation in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide a dexmedetomidine AUC0-infto a range between about 200 hr*ng / L to about 5000 hr*ng / L; wherein the Cmaxis about 50 ng / L to about 500 ng / L; wherein the patient is 65 years old or older; wherein the route of administration is selected from oromucosal, intravenous, intramuscular, subcutaneous, and transdermal.

[0277] In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 30 μg to about 130 μg, and wherein the patient has not received treatment for hypertension within about 10 hours prior to dexmedetomidine administration. In embodiments, the present disclosure provides a method of treating an acute agitation episode in a patient having dementia of Alzheimer’s type, comprising administering 60 mcg dexmedetomidine or a pharmaceutically acceptable salt thereof to the oral mucosa of the patient, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is self- administered by the patient, and wherein the agitation is moderate to severe agitation, wherein the patient is at least 65 years old, optionally at least 75 years old.

[0278] In embodiments, the agitation is not due to pain, infection, concomitant medication, environmental conditions, or a psychiatric condition other than dementia.

[0279] In embodiments, the patient does not have delirium.

[0280] In embodiments, the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof sublingually.

[0281] In embodiments, the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof buccally

[0282] In embodiments, the patient is determined to have a total score ^14 on the Positive and Negative Syndrome Scale (PANSS) - Excited Component (PEC) scale prior to administration.

[0283] In embodiments, the PEC score decreases by about 4 to about 6 points within 2 hours post-administration.

[0284] In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film, spray or wafer. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film.

[0285] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered on as-needed basis.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0286] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once or multiple times a day.

[0287] In embodiments, the present disclosure provides methods of treating acute agitation or signs of agitation in a human subject suffering from dementia, comprising administering about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof to the subject, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof is on “as- needed” (or PRN) basis.

[0288] In embodiments, the present disclosure provides methods of treating acute agitation or signs of agitation in a human subject suffering from dementia, comprising administering about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof is on “as- needed” (or PRN) basis.

[0289] In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered by the subject. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered sublingually, in embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered buccally.

[0290] In embodiments the subject was not previously treated with any antipsychotic medication.

[0291] In embodiments the subject was previously treated with antipsychotic medication.

[0292] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once daily.

[0293] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered up to a maximum of 28 doses within a period of 12 weeks. In embodiments, the subject is administered 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 or 28 doses of dexmedetomidine or a pharmaceutically acceptable salt thereof within a period of 12 weeks.

[0294] In embodiments, the agitation is psychotomor agitation.

[0295] In embodiments, the route of administration is oromucosal (e.g., sublingual, buccal or gingival). In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally as a film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered as a sublingual film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered as a buccal film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered as a gingival film.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0296] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered for at least 24 hours, 48 hours, a week or 2 weeks. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally for at least 12 weeks.

[0297] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally for about 15 weeks, 18 weeks, 21 weeks, 24 weeks or more. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally to the subject for as long as needed until the underlying disease resolves.

[0298] In embodiments, the subjects have a diagnosis of Alzheimer’s disease based on 2018 NIA-AA criteria. In embodiments, the subject has both dementia and Alzheimer’s disease.

[0299] In embodiments, the subjects have an MMSE score of 15 to 23. In embodiments, the subjects have an MMSE score of 16. In embodiments, the subjects have an MMSE score of 17. In embodiments, the subjects have an MMSE score of 18. In embodiments, the subjects have an MMSE score of 19. In embodiments, the subjects have an MMSE score of 20. In embodiments, the subjects have an MMSE score of 21. In embodiments, the subjects have an MMSE score of 22.

[0300] In embodiments, the subjects have a total score ^14 on the PEC scale prior to administering dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0301] In embodiments, the subjects have a total score of ^8 on the 4 items (aberrant vocalization, motor agitation, aggressiveness, and resisting care) comprising the Pittsburgh Agitation Scale (PAS) prior to administering dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0302] In embodiments, the subject is suffering from dementia for about 2 years. In embodiments, the subject is suffering from dementia for about 3 years. In embodiments, the subject is suffering from dementia for about 4 years. In embodiments, the subject is suffering from dementia for about 5 years or more.

[0303] In embodiments, the human subject is an elderly patient. In embodiments, the patient is at least 65 years old. In embodiments, the elderly patient is 65 years old or older. In embodiments, the elderly patient is 80 years old. In some embodiments, the agitation is chronic.

[0304] In embodiments,the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject produces only mild to moderate adverse effects.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0305] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in PEC total score compared to baseline score (i.e., pre-dose). In embodiments, the mean change in PEC score of greater than -2 relative to baseline is achieved within 2 hours of administration.

[0306] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in PAS score compared to baseline score (i.e. pre-dose). In embodiments, the mean change in PAS score of greater than -2 relative to baseline is achieved within 2 hours of administration.

[0307] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in ACES score compared to baseline score (i.e. pre-dose). In embodiments, the agitation is reduced to a 2 (moderate agitation), 3 (mild agitation) or 4 (normal behavior) within about 2 hours after administering the dexmedetomidine or a pharmaceutically acceptable salt thereof, as measured by the Agitation-Calmness Evaluation Scale (ACES).

[0308] In embodiments, the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof to the agitated human subject provides significant improvement in CGI- I score compared to baseline score (i.e., pre-dose). In embodiments, the CGI-I score improvement to about a 1 (very much improved) or about a 2 (much improved) is observed.

[0309] In embodiments, the improvement in score is observed as early as within 30 minutes of administration. In embodiments, the improvement in score is observed as early as within 1 hour of administration. In embodiments, the improvement in score is observed as early as within 2 hours of administration.

[0310] In embodiments, the present disclosure also provides methods of managing or treating agitation in subjects with delirium, comprising administering about 20 μg to about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the subject is hospitalized. In embodiments, the subject is hospitalized in the intensive care unit. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered at a dose of about 20 μg, about 30 μg, about 40 μg, about 50 μg, about 60 μg, about 70 μg, about 80 μg, about 90 ^g, about 100 μg, about 120 μg, about 150 μg, about 180 μg, about 210 μg, about 240 μg, about 270 μg, or about 300 μg.

[0311] In embodiments, the present disclosure provides methods of managing or treating agitation in subjects with delirium, comprising administering a dose of about 40 μg, about 60 μg, about 90 μg, about 120 μg or about 150 μg of dexmedetomidine or a pharmaceuticallyAttorney Docket No.: BXTI-059 / 02WO 332712-2423 acceptable salt thereof wherein the subject’s age is above 64 years old. In embodiments, one to ten doses can be administered at an appropriate dosing interval (e.g. 1 to 6 hours) to produce a desired effect; for example, about 60 μg, about 90 μg, about 120 μg, or about 150 μg dose (starting dose) is administered followed by an additional 5-7 doses of about 60 μg in a day at an interval ranging from about 1 to about 6 hours to produce the maximum cumulative dose of a about 480 μg dose.

[0312] In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering about 10 μg to about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia, e.g. about 10 μg, about 15 μg, about 20 μg, about 30 μg, about 40 μg, about 50 μg, about 60 μg, about 70 μg, about 80 μg, or about 90 ^g. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 10 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 20 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 30 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significantAttorney Docket No.: BXTI-059 / 02WO 332712-2423 sedation, comprising oromucosally administering a single dose containing about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with bipolar disorder. In embodiments, the present disclosure provides a method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with bipolar disorder. In embodiments, the subject is about 13-17 years old. In embodiments, the subject is about 10-17 years old. In embodiments, the agitation is acute. In embodiments, the subject is diagnosed with Attenuated Psychosis Syndrome DSM-5 298.8 (F28). In embodiments, the subject has a score of ^4 on at least 1 of the 5 items on the PEC at baseline. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually or buccally as a film. In embodiments, the reduction in agitation or signs of agitation is measured by relative change in PEC score after administration of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the clinical improvement in agitation is measured using PANSS, ACES, and / or CGI-I scales.

[0313] In embodiments, the pediatric subject is about 1 to about 18 years old, e.g., about 1 year old, about 2 years old, about 3 years old, about 4 years old, about 5 years old, about 6 years old, about 7 years old, about 8 years old, about 9 years old, about 10 years old, about 11 years old, about 12 years old, about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years old, about 18 years old, including all values and ranges in between.

[0314] In embodiments, the pediatric subject is about 10 to about 17 years old, e.g., about 10 years old, about 11 years old, about 12 years old, about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years, including all values and ranges in between.

[0315] In embodiments, the pediatric subject is about 13 to about 17 years old, e.g., about 13 years old, about 14 years old, about 15 years old, about 16 years old, about 17 years old, including all values and ranges in between.

[0316] In embodiments, the present disclosure also provides methods of treating or ameliorating opioid withdrawal symptoms, comprising administering a composition comprising dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) to a human patient in need thereof. In embodiments, onset of opioid withdrawal begins within 6-24 hours from last opioid use.

[0317] In embodiments, the present disclosure provides methods of treating or ameliorating opioid withdrawal symptoms, comprising administering a composition comprisingAttorney Docket No.: BXTI-059 / 02WO 332712-2423 dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) to a human patient in need thereof, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 20 μg to about 600 μg, e.g., about 20 μg, about 30 μg, about 40 μg, about 50 μg, about 60 μg, about 70 μg, about 80 μg, about 90 μg, about 100 μg, about 110 μg, about 120 μg, about 130 μg, about 140 μg, about 150 μg, about 160 μg, about 170 μg, about 180 μg, about 190 μg, about 200 μg, about 210 μg, about 220 μg, about 230 μg, about 240 μg, about 250 μg, about 260 μg, about 270 μg, about 280 μg, about 290 μg, about 300 μg, about 310 μg, about 320 μg, about 330 μg, about 340 μg, about 350 μg, about 360 μg, about 370 μg, about 380 μg, about 390 μg, about 400 μg, about 410 μg, about 420 μg, about 430 μg, about 440 μg, about 450 μg, about 460 μg, about 470 μg, about 480 μg, about 490 μg, about 500 μg, about 510 μg, about 520 μg, about 530 μg, about 540 μg, about 550 μg, about 560 μg, about 570 μg, about 580 μg, about 590 μg, or about 600 μg, including all values and ranges in between. In embodiments, the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 240 μg twice a day (in an interval of 12 hours). In embodiments, the patient is at least 18 years old. In embodiments, the period of withdrawal is up to 14 days. In embodiments, the period of withdrawal is up to 12 days. In embodiments, the period of withdrawal is up to 10 days. In embodiments, the period of withdrawal is up to 6 days.

[0318] It was unexpectedly discovered that dexmedetomidine is effective at reducing the period of opioid withdrawal in a subject. This is surprising because opioids (e.g., fentanyl) become localized in body fat over time and are released intermittently and have unpredictable effects on patients during the withdrawal process. Due to the high degree of variability and intermittent release of opioids, a clinician would not have expected repeated administration of dexmedetomidine to be an effective therapy.

[0319] In embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering to said subject dexmedetomidine or a pharmaceutically acceptable salt thereof once daily. In embodiments, the period of withdrawal is 1 day to 14 days, e.g., 14 days, 13 days, 12 days, 11 days, 10 days, 9 days, 8 days, 7 days, 6 days, 5 days, 4 days, or 3 days, including all values and ranges in between.

[0320] In embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering to said subject dexmedetomidine or a pharmaceutically acceptable salt thereof twice daily. In embodiments, the period of withdrawal is 1 day to 14 days, e.g., 14 days, 13 days, 12 days, 11 days, 10 days,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 9 days, 8 days, 7 days, 6 days, 5 days, 4 days, or 3 days, including all values and ranges in between.

[0321] In other embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering to said subject dexmedetomidine or a pharmaceutically acceptable salt thereof twice daily. In embodiments, the period of withdrawal is up to about 60 days. In embodiments, the period of withdrawal may be 59 days, 58 days, 57 days, 56 days, 55 days, 54 days, 53 days, 52 days, 51 days, 50 days, 49 days, 48 days, 47 days, 46 days, 45 days, 44 days, 43 days, 42 days, 41 days, 40 days, 39 days, 38 days, 37 days, 36 days, 35 days, 34 days, 33 days, 32 days, 31 days, 30 days, 29 days, 28 days, 27 days, 26 days, 25 days, 24 days, 23 days, 22 days, 21 days, 20 days, 19 days, 18 days, 17 days, 16 days, 15 days, 14 days, 13 days, 12 days, 11 days, 10 days, 9 days, 8 days, 7 days, 6 days, 5 days, 4 days or 3 days, including all values and ranges in between.

[0322] In embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering to said subject dexmedetomidine or a pharmaceutically acceptable salt thereof twice daily, wherein the period of withdrawal is up to 14 days. In embodiments, the period of withdrawal is up to 12 days. In other embodiments, the present disclosure provides a method of reducing a period of opioid withdrawal in a human subject in need thereof, comprising administering to said subject dexmedetomidine or a pharmaceutically acceptable salt thereof twice daily where the period of withdrawal is up to about 60 days. In embodiments, the human subject is an adult (e.g., at least 18 years old) and suffering with opioid use disorder who is physically dependent on opioids. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt is administered sublingually, buccally, orally, intranasally or parenterally. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride) is administered sublingually as a film. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered at a dose range of about 30 μg to about 600 μg, e.g., about 20 μg, about 30 μg, about 40 μg, about 50 μg, about 60 μg, about 70 μg, about 80 μg, about 90 μg, about 100 μg, about 110 μg, about 120 μg, about 130 μg, about 140 μg, about 150 μg, about 160 μg, about 170 μg, about 180 μg, about 190 μg, about 200 μg, about 210 μg, about 220 μg, about 230 μg, about 240 μg, about 250 μg, about 260 μg, about 270 μg, about 280 μg, about 290 μg, about 300 μg, about 310 μg, about 320 μg, about 330 μg, about 340 μg, about 350 μg, about 360 μg, about 370 μg, about 380 μg, about 390 μg, about 400 μg, about 410 μg, about 420 μg, about 430 μg, about 440 μg, about 450 μg, about 460 μg, about 470 μg, about 480 μg,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 about 490 μg, about 500 μg, about 510 μg, about 520 μg, about 530 μg, about 540 μg, about 550 μg, about 560 μg, about 570 μg, about 580 μg, about 590 μg, or about 600 μg, including all values and ranges in between. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is oromucosally administered at a dose range of about 30 μg to about 600 μg as a single dose. In embodiments, dexmedetomidine is administered as a dose of about 30 μg, about 60μg, about 90 μg, about 120 μg, about 180 μg, about 240 μg, or about 300 μg twice daily approximately 12 hours apart for a period of at least 3 days (e.g., 3 days, 4 days, 5 days, 6 days, 7 days, 8 days, 9 days, 10 days, 11 days, 12 days or 13 days). In embodiments, each unit may be administered at an appropriate dosing interval (e.g., about 12 hours between doses) or can be administered concurrently, for example two units of 30 μg can be administered concurrently to produce the effect of a 60 μg dose or three units of 60 μg can be administered concurrently to produce the effect of a 180 μg dose.

[0323] In embodiments, the opioid may be selected from the group consisting of, but are not limited to fentanyl, morphine, codeine, heroin, oxycodone, hydrocodone, alfentanil, carfentanil, tramadol, hydromorphone, buprenorphine, naloxone, naltrexone, remifentanil butorphanol, meperidine, methadone, dextropropoxyphene (propoxyphene) thebaine, sufentanil or pentazocine. In embodiments, the opioid had been administered for the amount of time longer than neonate treatment prior to withdrawal.

[0324] In embodiments, the dose range of dexmedetomidine or a pharmaceutically acceptable salt thereof of between about 30 μg and about 600 μg. For example, the composition comprises a unit dose of about 30 μg, about 60 μg, about 90 μg, about 120 μg, 150 μg, 180 μg, 240 μg, or 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, a single dose of about 180 μg dexmedetomidine or a pharmaceutically acceptable salt thereof is effective for up to at least about 24 hours. In embodiments, the dose is administered twice daily. In embodiments, the composition is administered twice daily for 7 days.

[0325] In embodiments, the mean plasma concentrations required to achieve the reduction in opioid withdrawal symptoms on day 6 after 2 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g. hydrochloride) are in the range of about 40 ng / L to about 500 ng / L (for example about 40 ng / L to about 450 ng / L; about 40 ng / L to about 400 ng / L; about 40 ng / L to about 350 ng / L; about 40 ng / L to about 300 ng / L; about 40 ng / L to about 250 ng / L; about 40 ng / mL to about 200 ng / L; about 50 ng / L to about 150 ng / L; about 60 ng / L to about 150 ng / L; about 70 ng / L to about 100 ng / L including about 75 ng / L; about 80 ng / L, about 90 ng / L, about 95 ng / L, about 105 ng / L, about 115 ng / L, about 120 ng / L),Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0326] In embodiments, the mean plasma concentrations required to achieve the reduction in opioid withdrawal symptoms on day 6 after 6 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g. hydrochloride) are in the range of about 20 ng / L to about 200 ng / L (for example about 20 ng / L to about 180 ng / L; about 20 ng / L to about 175 ng / L ; about 30 ng / L to about 170 ng / L; about 35 ng / L to about 165 ng / L; about 40 ng / L to about 160 ng / L; about 50 ng / L to about 150 ng / L; about 65 ng / L to about 125 ng / L; about 60 ng / L to about 100 ng / L; including about 70 ng / L; about 75 ng / L, about 80 ng / L, about 85 ng / L, about 90 ng / L, about 95 ng / L.

[0327] In embodiments, the mean plasma concentrations required to achieve the reduction in opioid withdrawal symptoms on day 6 after 12 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g. hydrochloride).are in the range of about 20 ng / L to about 150 ng / L (for example : about 20 ng / L to about 125 ng / L; about 20 ng / L to about 100 ng / L; about 30 ng / L to about 90 ng / L, about 30 ng / L to about 75 ng / L).

[0328] In embodiments, the mean plasma concentrations required to achieve the reduction in opioid withdrawal symptoms on day 12 after 2 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g. hydrochloride) are in the range of about 50 ng / L to about 500 ng / L (for example : about 50 ng / L to about 450 ng / L; about 50 ng / L to about 400 ng / L; about 75 ng / L to about 350 ng / L; about 75 ng / mL to about 300 ng / L; about 90 ng / L to about 250 ng / L ; about 90 ng / L to about 200 ng / L; about 100 ng / L to about 150 ng / L including about 140 ng / L, about 130 ng / L, about 125 ng / L , about 120 ng / L, about 110 ng / L).

[0329] In embodiments, the mean plasma concentrations required to achieve the reduction in opioid withdrawal symptoms on day 12 after 6 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g. hydrochloride) are in the range of about 20 ng / L to about 250 ng / L (for example : about 20 ng / L to about 225 ng / L, about 20 ng / L to about 200 ng / L, about 20 ng / L to about 180 ng / L; about 20 ng / L to about 175 ng / L; about 30 ng / L to about 170 ng / mL; about 35 ng / L to about 165 ng / L; about 40 ng / L to about 160 ng / L; about 50 ng / L to about 150 ng / L; about 65 ng / L to about 125 ng / L; about 60 ng / L to about 100 ng / L including about 70 ng / L; about 75 ng / L, about 80 ng / L, about 85 ng / L, about 90 ng / L, about 95 ng / L).

[0330] In embodiments, the mean plasma concentrations required to achieve the reduction in opioid withdrawal symptoms on day 12 after 12 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt are in the range of about 10 ng / L to 150 ng / L (for example: about 10 ng / L to 140 ng / L; about 20 ng / L to about 130 ng / L; about 30 ng / L to about 120 ng / L;Attorney Docket No.: BXTI-059 / 02WO 332712-2423 about 40 ng / L to about 100 ng / L; about 50 ng / L to about 90 ng / L; about 75 ng / L to about 90 ng / L).

[0331] In embodiments, the mean plasma concentrations values are preferably 80% to 125% of these ranges and values.

[0332] In embodiments, the present disclosure provides a method of treating cocaine toxicity and / or symptoms associated with cocaine toxicity comprising administering oromucosally an effective amount of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered as an oromucosal film at a dose range of about 30 μg to about 400 μg as a single dose or as a multi-dose therapy. In embodiments, the present disclosure provides a pharmaceutical composition comprising from about 20 μg to about 600 μg dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride). In embodiments, the dose of dexmedetomidine is about 120 μg. In embodiments, the dose of dexmedetomidine is about 180 μg. In embodiments, the dose of dexmedetomidine is about 150 μg. In embodiments, the dose of dexmedetomidine is about 240 μg. In embodiments, the dose of dexmedetomidine is about 300 μg. Clinical Endpoints

[0333] The reduction of agitation in the elderly dementia patients may be assessed using various measurements: PEC, PAS, ACES, Mod-CMAI, and / or CGI-I.

[0334] In embodiments, the patient achieves a mean change in PEC score of greater than -2, -3, -4, -5, -6, -7, -8, -9, or -10 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 30 μg and patient achieves a mean change in PEC score of greater than -4 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 40 μg and patient achieves a mean change in PEC score of greater than -5 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 60 μg and patient achieves a mean change in PEC score of greater than -7 relative to baseline within 2 hours of administering the composition. In embodiments, the decrease in PEC score is maintained for at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, hours following administration of the composition.

[0335] In embodiments, the patient achieves a mean change in PAS score of greater than -2, -3, -4, -5, -6, -7, -8, -9, or -10 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 30 μg and patient achieves aAttorney Docket No.: BXTI-059 / 02WO 332712-2423 mean change in PAS score of greater than -3 relative to baseline within 2 hours of administering the composition.

[0336] In embodiments, the dose of dexmedetomidine is 40 μg and patient achieves a mean change in PAS score of greater than -4 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 60 μg and patient achieves a mean change in PEC score of greater than -5 relative to baseline within 2 hours of administering the composition. In embodiments, the decrease in PAS score is maintained for at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, hours following administration of the composition.

[0337] In embodiments, the patient achieves a mean change in Mod-CMAI score of greater than -7, -8, -9, -10, -11, -12, -13, -14, -15, -16, -17, or -18 relative to baseline 2 hours after administering the composition. In embodiments, the dose of dexmedetomidine is 30 μg and patient achieves a mean change in Mod-CMAI score of greater than -7 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 40 μg and patient achieve a mean change in Mod-CMAI score of greater than -10 relative to baseline within 2 hours of administering the composition. In embodiments, the dose of dexmedetomidine is 60 μg and patient achieves a mean change in Mod-CMAI score of greater than -13 relative to baseline within 2 hours of administering the composition. In embodiments, the decrease in Mod-CMAI score is maintained for at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, hours following administration of the composition.

[0338] In embodiments, the patient achieves a CGI-I score improvement to about a 1 (very much improved) or about a 2 (much improved). In embodiments, the score improvement is sustained for a period of about 2 hours to about 6 hours. In embodiments, the dose of dexmedetomidine is 30 μg. In embodiments, the dose of dexmedetomidine is 40 μg. In embodiments, the dose of dexmedetomidine is 60 μg. In embodiments, the score is sustained for a period of about 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or about 12 hours.

[0339] In embodiments, the agitation is reduced to a 2 (moderate agitation), 3 (mild agitation) or 4 (normal behavior) 2 hours after administering the composition, as measured by the Agitation-Calmness Evaluation Scale (ACES). In embodiments, the dose of dexmedetomidine is 60μg. In embodiments, the dose of dexmedetomidine is 40 μg. In embodiments, the agitation is reduced to a 3 (mild agitation).

[0340] In embodiments, following administering of about 20 μg to about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. dexmedetomidine hydrochloride) to an agitated human subject with delirium hospitalized (e.g. in an ICU), theAttorney Docket No.: BXTI-059 / 02WO 332712-2423 agitation or signs of agitation and delirium severity are significantly reduced as measured by the RASS and DRS-R-98 respectively. For example, the agitation or signs of agitation and delirium severity are significantly reduced as measured by the RASS and DRS-R-98 just prior to and after every 30 minutes, 1 hour, 2 hours, 3, hours, 4 hours, 5 hours, or 6 hours post- administration of dexmedetomidine. In embodiments, the subject experiences a 2-point or greater drop in RASS at 2 hours after administration of about 20 μg to about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the subject experiences a 2-point or greater drop in RASS at 2 hours after administration of about 30 μg, about 60 μg, about 90 μg, about 120 μg, about 180 μg, about 240 μg, or about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, the subject experiences a 2-point or greater drop in RASS at 2 hours after administration of about 20 μg to about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the subject’s initial RASS was not less than or equal to -3.

[0341] The treating or ameliorating opioid withdrawal symptoms may be measured by a variety of well-known means in the art, including but not limited to, the Clinical Opiate Withdrawal Scale (COWS) and / or Short Opiate Withdrawal Scale of Gossop (SOWS-Gossop) score.

[0342] In embodiments, the withdrawal symptoms following the treatment are assessed using the Clinical Opiate Withdrawal Scale and / or the Short Opiate Withdrawal Scale of Gossop (e.g., over a 10-day period).

[0343] In embodiments, following administering a unit dose of about 30 μg, about 60 μg, about 90 μg, about 120 μg, about 180 μg , about 240 μg, or about 300 μg of dexmedetomidine or a pharmaceutically acceptable thereof in a human subject experiencing opioid withdrawal symptoms (e.g. agitation or signs of agitation), the withdrawal symptoms are significantly reduced as measured by the relative COWS and / or the SOWS-Gossop scores just prior to and 2 hour post administration of dexmedetomidine or a pharmaceutically acceptable salt thereof. In embodiments, each unit may be administered twice daily over an appropriate period of withdrawal (e.g. for at least 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14 days). Pharmaceutical compositions Dosage Forms / Administration Methods

[0344] In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered oromucosally in the form of a tablet, film, spray, gel or drops, particularly a film. In embodiments, the film is placed under the tongue, close to the base of the tongue, on the leftAttorney Docket No.: BXTI-059 / 02WO 332712-2423 or right side. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a film, patch or tablet, particularly a film. In embodiments, the film is placed against the inner lip or check, close to the jaw line. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered parenterally to the subject in the form of an intramuscular injection. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered to the subject by oral route. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered orally in the form of tablets, orally disintegrating tablets (ODTs), effervescent tablets, capsules, pellets, pills, lozenges or troches, powders, dispersible granules, catchets, aqueous solutions, syrups, emulsions, suspensions, solutions, soft gels, dispersions and the like. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered orally to the subject in the form of an orally disintegrating tablet

[0345] According to the present disclosure, dexmedetomidine or a pharmaceutically acceptable salt thereof can be administered to the human subject through various routes, including oromucosal (e.g. sublingual, buccal), oral, parenteral and the like. Formulations suitable for use according to the present disclosure are outlined below. Additional formulations suitable for use according to the present disclosure are described in US 2020 / 0000717, which is hereby incorporated by reference in its entirety for all purposes. Oromucosal formulations (Sublingual and / or buccal formulations)

[0346] Dexmedetomidine or a pharmaceutically acceptable salt thereof can be formulated, according to the present disclosure, into dosage forms suitable for oromucosal (e.g., sublingual or buccal) administration. Such dosage forms include tablets, powders, pills, films, capsules, liquids, gels, syrups, slurries, suspensions, and the like. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is formulated as a film product.

[0347] Carriers suitable for inclusion in oromucosal (e.g., sublingual or buccal) formulations include, but are not limited to, sugars, starches, cellulose and its derivatives, malt, gelatin, talc, calcium sulphate, vegetable oils, synthetic oils, polyols, alginic acid, phosphate buffered solutions, emulsifiers, isotonic saline, pyrogen - free water and combinations thereof. Carriers which readily dissolve in saliva may be preferred.

[0348] Oromucosal (e.g., sublingual or buccal) formulations may also include other pharmaceutically acceptable carriers and / or excipients such as binders, lubricants, diluents, coatings, disintegrants, barrier layer components, glidants, coloring agents, solubility enhancers, gelling agents, fillers, proteins, co-factors, emulsifiers, solubilizing agents,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 suspending agents and mixtures thereof. Particular excipients, which may be used according to this disclosure, are known in the art, for example as described in Handbook of Pharmaceutical Excipients, fifth edition, 2005 edited by Rowe et al., Mcgraw Hill. Films

[0349] Suitable films for sublingual or buccal administration (i.e., oromucosal administration) according to the present disclosure comprise dexmedetomidine or a pharmaceutically acceptable salt thereof either (i) disposed within a polymer matrix or (ii) deposited on the surface of a polymer matrix, e.g., on the surface of a “placebo” film. Polymer component of film

[0350] The polymer component consists of one or more water-soluble polymers within the film matrix and / or as part of the drug-containing deposit (e.g., one or more droplets) on the surface of the polymer. In embodiments of the disclosure, the polymer component consists of a single water-soluble polymer. In embodiments, the polymer component consists of two or more water- soluble polymers, including two or more of the same water-soluble polymers having different molecular weights.

[0351] The polymer component in the film matrix is of a suitable composition and present in a sufficient amount to ensure rapid disintegration of the film matrix in the oral mucosa. For example, the presence of the polymer component may allow the film matrix to disintegrate completely oromucosally in about 15 seconds to about 180 seconds, for example, about 30 seconds to about 180 seconds, including about 120 seconds. The polymer component in the film matrix also provides the film with sufficient strength (i.e., the film is self-supporting).

[0352] When present in one or more droplets of the dexmedetomidine composition deposited onto the surface of the polymer matrix / substrate, the polymer component may, for example, consist of the water-soluble polymer hydroxypropyl cellulose, although different water-soluble polymers are also contemplated as described hereinafter under the definition “first water- soluble polymer” and “second water soluble polymer”. For example, the polymer component may consist of one, two or three hydroxypropyl celluloses having different molecular weights. The molecular weights of the different hydroxypropyl celluloses may conveniently range from (i) less than about 60,000 Daltons (e.g., about 5,000 Daltons to about 49,000 Daltons) (ii) about 90,000 Daltons to about 200,000 Daltons and (iii) about 200,000 Daltons to about 500,000 Daltons. The two or more hydroxypropyl celluloses may be mixed in any suitable ratio to achieve the desired droplet viscosity. The viscosity of the dexmedetomidine compositionAttorney Docket No.: BXTI-059 / 02WO 332712-2423 solution or suspension can be measured using a Brookfield viscometer with a small sample adapter at a temperature of 25ƕC and may range from about 5 cps to about 3700 cps. For example, it may range from about 5 cps to about 500 cps, about 6 cps to about 200 cps, about 6 cps to about 100 cps or about 6 cps to about 50 cps. In some embodiments of the present disclosure, the viscosity of the dexmedetomidine composition solution or suspension is from about 6 cps to about 20 cps at 25ƕC and a shear rate of about 7 (1 / s).

[0353] When present in a monolithic (i.e., placebo or drug-containing) film, the polymer component may, for example, consist of one water soluble polymer or two different water- soluble polymers. When two different water-soluble polymers are present, one of the water- soluble polymers may include the same polymer but present in the polymer component as a combination of different molecular weights. For example, the polymer component may consist of one, two or three hydroxypropyl celluloses having different molecular weights, although different water-soluble polymers are also contemplated as described hereinafter under the definition “first water-soluble polymer” and “second water soluble polymer” such as polyethylene oxide. The molecular weights of the different hydroxypropyl celluloses may conveniently range from (i) less than about 60,000 Daltons (e.g., about 5000 Daltons to about 49000 Daltons) (ii) about 90000 Daltons to about 200000 Daltons and (iii) about 200,000 Daltons to about 500,000 Daltons (e.g. about 300000 Daltons to about 450000 Daltons). The two or more hydroxypropyl celluloses (e.g., low and high molecular weight hydroxypropyl celluloses) may be mixed in any suitable ratio to achieve the desired film properties. When present in a monolithic (i.e., placebo or drug-containing) film or micro-deposited film matrix composition, the polymer component may conveniently consist of one or more water-soluble polymers having a molecular weight less than about 60,000 Daltons (e.g., about 5,000 Daltons to about 49,000 Daltons), and / or from about 90000 Daltons to about 200,000 Daltons and / or about 200,000 Daltons to about 500,000 Daltons (e.g. about 300000 Daltons to about 450000 Daltons). When a structurally different water-soluble polymer is also present, it may conveniently have a higher molecular weight, for example a molecular weight greater than about 500,000 Daltons.

[0354] In embodiments, the disclosure provides pharmaceutical film compositions, comprising: (i) dexmedetomidine or a pharmaceutically acceptable salt thereof; (ii) a polymer component consisting of a first water-soluble polymer having a molecular weight less than about 60,000 Daltons (e.g. about 5,000 Daltons to about 49,000 Daltons), and one or moreAttorney Docket No.: BXTI-059 / 02WO 332712-2423 second-water soluble polymers having a molecular weight greater than about 60,000 Daltons; and, optionally, (iii) one or more pharmaceutically acceptable carriers.

[0355] In embodiments, the disclosure provides pharmaceutical film compositions comprising: (i) dexmedetomidine or a pharmaceutically acceptable salt thereof; (ii) a polymer component consisting of a first water-soluble polymer having a molecular weight less than about 60,000 Daltons (e.g. about 5,000 Daltons to about 49,000 Daltons), and one or more second-water soluble polymers having a molecular weight greater than about 60,000 Daltons; and, optionally, (iii) one or more pharmaceutically acceptable carriers.

[0356] In embodiments, the disclosure provides pharmaceutical film compositions consisting of: (i) dexmedetomidine or a pharmaceutically acceptable salt thereof; (ii) a polymer component consisting of a first water-soluble polymer having a molecular weight less than about 60,000 Daltons (e.g. about 5,000 Daltons to about 49,000 Daltons), and one or more second water-soluble polymers having a molecular weight greater than about 60,000 Daltons; and, optionally, (iii) one or more pharmaceutically acceptable carriers.

[0357] In embodiments, one or more first water-soluble polymers are selected from the group consisting of hydroxypropyl cellulose (HPC), hydroxyethyl cellulose, hydroxypropyl methylcellulose (HPMC), carboxymethyl cellulose, methyl cellulose and mixtures thereof, including mixtures of the same polymer having different molecular weights.

[0358] In embodiments, one or more second water-soluble polymers are selected from the group consisting of hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, carboxy methylcellulose, methylcellulose and mixtures thereof, including mixtures of the same polymer having different molecular weights. Polyethylene oxide (PEO) may also be present herein as a second water-soluble polymer or may be described separately hereinafter in the pharmaceutical film compositions as an example of a pharmaceutically acceptable carrier, or more particularly, as a mucoadhesive agent.

[0359] In embodiments, the weight ratio of said first water-soluble polymer to said second water-soluble polymer(s) (including PEO when present in the film) in the entire film composition is from about 2:1 to about 1:50, e.g., about 1:1, about 1:2, about 1:3, about 1:4, about 1:5, about 1:6, about 1:7, about 1:8, about 1:9, about 1:10, about 1:11, about 1:12, about 1:13, about 1:14, about 1:15, about 1:16, about 1:17, about 1:18, about 1:19, about 1:20, about 1:21, about 1:22, about 1:23, about 1:24, about 1:25, about 1:26, about 1:27, about 1:28, about 1:29, about 1:30, about 1:31, about 1:32, about 1:33, about 1:34, about 1:35, about 1:36, about 1:37, about 1:38, about 1:39, about 1:40, including all values and ranges in between.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0360] In embodiments, the weight ratio of said first water-soluble polymer to said second water-soluble polymer(s) (including PEO when present in the film) in the entire film composition is from about 1:10 to about 1:30, about 1:15 to about 1:25 or about 1:15 to about 1:20. In embodiments, a ratio of about 1:15 to about 1:20 provides beneficial functional effects.

[0361] In embodiments, other water-soluble polymers which may be included in the film with the first water-soluble polymer / second water-soluble polymer or replace such polymer(s). In embodiments other water-soluble polymers include povidone (polyvinylpyrrolidone), copovidone (copolymers of N-vinyl-2-pyrrolidone and vinyl acetate), polyvinyl alcohol, polyethylene glycol, polyacrylic acid, methylmethacrylate copolymer, carboxyvinyl copolymers, polydextrose, pullulan, carboxymethyl cellulose, sodium alginate, chitosan, xanthan gum, tragacanth gum, guar gum, acacia gum, arabic gum, starch, carrageenan, gelatin and mixtures thereof. The water-soluble polymer component, including water-soluble polymer carriers when present, may conveniently comprise about 40% to about 99.8%, about 50% to about 99.7%, about 60% to about 99.6% of the film composition, based on the weight of the film on a dry weight basis.

[0362] In embodiments, the polymer component for the film composition comprises a first water-soluble polymer present in an amount of from about 2% to about 15% on a dry weight basis of the polymer component (e.g., about 3% to about 8% w / w of the total film weight). This water-soluble polymer may conveniently have a molecular weight from about 5,000 Daltons to about 49,000 Daltons. Examples of suitable such water-soluble polymers include those selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose, carboxymethyl cellulose, methyl cellulose, and mixtures thereof.

[0363] In embodiments, low molecular weight hydroxypropyl cellulose may be present in the film at about 3% to about 8% w / w of the total film weight.

[0364] In embodiments, one or more second water-soluble polymers (e.g., polyethylene oxide) are present in an amount of from about 50 to about 98 weight percent on dry weight basis of the polymer component. In embodiments, the one or more second water-soluble polymers each has a molecular weight greater than 60,000 Daltons, for example, from about 90,000 Daltons to about 1,500,000 Daltons, especially when the polymer is selected from the group consisting of polyethylene oxide, hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, carboxy methylcellulose, methylcellulose, and mixtures thereof.

[0365] In embodiments, the one or more second water-soluble polymers are present in the film from about 25% w / w to about 40% w / w of the total film weight; the one or more second water-Attorney Docket No.: BXTI-059 / 02WO 332712-2423 soluble polymers each has a molecular weight from about 90,000 Daltons to about 200,000 Daltons and / or from about 200,000 Daltons to about 500,000 Daltons, and the polymer is selected from the group consisting of hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, carboxy methylcellulose, methylcellulose, and mixtures thereof.

[0366] In embodiments, polyethylene oxide is present in the film at about 50% to about 60% w / w of the total film weight.

[0367] In embodiments, the polymer component of the film composition consists of a low molecular weight, water-soluble polymer (e.g., having a molecular weight less than about 60,000 Daltons) and one or more high molecular weight polymers (e.g., having a molecular weight greater about 60,000, up to about 1,500,000 Daltons when polyethylene oxide is included in the polymer mixture or up to about 500,000 Daltons when polyethylene oxide is not included in the polymer mixture). This polymer combination, especially when the polymers are a combination of hydroxypropyl cellulose and polyethylene oxide, lends certain advantages to the tensile strength and pharmacokinetics of the film composition.

[0368] In embodiments, the present disclosure provides a film composition comprising a therapeutically effective amount of dexmedetomidine or a pharmaceutically acceptable salt thereof; a polymer component comprising a water-soluble polymer and a pharmaceutically acceptable carrier.

[0369] In embodiments, the present disclosure provides a film composition comprising a therapeutically effective amount of dexmedetomidine or a pharmaceutically acceptable salt thereof; a polymer component comprising (a) a first water-soluble polymer (e.g. hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, carboxy methylcellulose, methylcellulose, and mixtures thereof) having a molecular weight from about 5,000 Daltons to about 49,000 Daltons, for example, in about 2 to about 15 weight percent on dry weight basis of the total polymer component; and (b) a second water-soluble polymers (e.g. polyethylene oxide, hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, carboxy methylcellulose, methylcellulose, and mixtures thereof) having a molecular weight greater than 60,000 Daltons (e.g. greater than 100000 Daltons), in about 50 to about 98 weight percent on dry weight basis of the total polymer component; and a pharmaceutically acceptable carrier.

[0370] The molecular weight of hydroxypropyl cellulose, when present in the film of the present disclosure, may be varied, and may be present as both a low molecular weight, water- soluble polymer and as one or more high molecular weight, water-soluble polymers. InAttorney Docket No.: BXTI-059 / 02WO 332712-2423 embodiments, the molecular weight is less than about 60,000 Daltons (e.g., about 5,000 Daltons to about 49,000 Daltons). In embodiments the molecular weight of hydroxypropyl cellulose is about 90,000 Daltons to about 200,000 Daltons. In embodiments, the molecular weight of hydroxypropyl cellulose is about 200,000 Daltons to about 500,000 Daltons.

[0371] In embodiments, the composition comprises hydroxypropyl cellulose, in the range of about 10% to about 90% by weight on a dry weight basis of the polymer component, e.g. about 20% to about 80%, e.g. about 20% to about 50%, e.g. about 25% to about 45%.

[0372] The molecular weight of polyethylene oxide, in the film of the present disclosure, may also be varied. In embodiments, the composition comprises a water-soluble, high molecular weight polyethylene oxide, to increase muco-adhesivity of the film. In embodiments, the molecular weight of polyethylene oxide is about 100,000 Daltons to about 1,500,000 Daltons, e.g., about 100,000 Daltons, about 200,000 Daltons, about 300,000 Daltons, about 600,000 Daltons, about 900,000 Daltons or 1,000,000 Daltons. In embodiments, the composition comprises a combination of polyethylene oxide having a molecular weight of about 600,000 Daltons to about 900,000 Daltons and polyethylene oxide having a molecular weight of about 100,000 Daltons to about 300,000 Daltons in the polymer component.

[0373] In embodiments, the composition contains, about 30% to about 90% polyethylene oxide by weight on a dry weight basis of the total polymer component, e.g., about 40% to about 85%, and about 55% to about 80% polyethylene oxide by weight on a dry weight basis of the polymer component.

[0374] Such film compositions may contain the drug dispersed within the film, or micro- deposited onto a surface of the film. When micro-deposited on the surface of a “placebo” film, the drug may conveniently be added as part of a dexmedetomidine composition as one or more droplets in a liquid carrier, such as a solvent (e.g., an alcohol such as ethanol), optionally together with one or more (e.g. two) water-soluble polymers and / or pharmaceutically acceptable carriers. Suitable water-soluble polymers include (1) a low molecular weight, water- soluble polymer, for example a low molecular weight, water-soluble polymer having a molecular weight of less than about 60,000 Daltons (e.g. a molecular weight of about 5,000 Daltons to about 49,000 Daltons and optionally (2) one or more (e.g. one or two) high molecular weight, water-soluble polymers, for example a high molecular weight, water-soluble polymer having a molecular weight of greater than about 60,000 Daltons (e.g. a molecular weight of from about 60,000 Daltons to about 150,000 Daltons such as hydroxypropyl cellulose (77,000MW), hydroxypropyl cellulose (80,000MW), hydroxypropyl cellulose (90,000MW), orAttorney Docket No.: BXTI-059 / 02WO 332712-2423 hydroxypropyl cellulose (140,000MW)) and / or a high molecular weight, water-soluble polymer having a molecular weight of greater than about 60,000 Daltons (e.g. a molecular weight of from about 200,000 Daltons to about 900,000 Daltons such as hydroxypropyl cellulose (about 340,000MW), hydroxypropyl cellulose (about 370,000MW), polyethylene oxide (about 200,000MW) or polyethylene oxide (about 600,000MW)). Each water-soluble polymer may independently be selected from the group consisting of hydroxypropyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, carboxymethyl cellulose, polyethylene oxide and methyl cellulose, e.g., hydroxypropyl cellulose and / or polyethylene oxide.

[0375] In embodiments, the composition comprises dexmedetomidine hydrochloride, a low molecular weight polymer which is hydroxypropyl cellulose and one or two high molecular weight polymers which are each hydroxypropyl cellulose in an ethanol solvent.

[0376] In embodiments, the composition comprises dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride), hydroxypropyl cellulose (about 40,000MW) and one or both of hydroxypropyl cellulose (about 140,000MW) and hydroxypropyl cellulose (about 370,000MW).

[0377] In embodiments, the composition comprises dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride), and only two hydroxypropyl celluloses, namely hydroxypropyl cellulose (about 40,000MW) and hydroxypropyl cellulose (about 140,000MW).

[0378] In embodiments, the deposition composition may be in any form, including as a solution, emulsion, suspension or dispersion. For example, the dexmedetomidine composition may be added as one or more droplets in an ethanol-based solution, optionally containing a pH- neutralizing agent such as sodium hydroxide. In embodiments, the film substrate surface contains two or more micro-deposited spots of dexmedetomidine hydrochloride (e.g., two microdeposited spots) in a polymer matrix. The viscosity of deposition solution / suspension may range from about 6 cps to about 3700 cps as measured at 25ƕC using a Brookfield viscometer with a small sample adapter. As an example, it may range from about 5 cps to about 500 cps, about 6 cps to about 200 cps, about 6 cps to about 100 cps or about 6 cps to about 50 cps.

[0379] In embodiments of the present disclosure, the viscosity of the dexmedetomidine composition is from about 6 cps to about 20 cps at 25ƕC and a shear rate of about 7 (1 / s).Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0380] Following drying to remove the solvent, the film comprises a film substrate (e.g., a placebo) with the dexmedetomidine composition as previously described but absent the solvent deposited (e.g. micro-deposited) on the surface of the film substrate. The dried composition containing dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) may cover the whole of the film substrate surface or only part of the film substrate surface.

[0381] In embodiments, the dried dexmedetomidine composition appears as one or more discrete drug-containing droplets on the film substrate surface. Alternatively, stenciling may be used to achieve a one or more defined and discrete regions of drug-containing composition on the surface of the film substrate.

[0382] In embodiments, the disclosure provides a dry film product comprising a film substrate with one or more discrete drug-containing droplets on the film substrate surface, wherein each such drug-containing droplet comprises dexmedetomidine or a pharmaceutically acceptable salt thereof , and hydroxypropyl cellulose of two molecular weights: hydroxypropyl cellulose (40,000MW) available as HPC-SSL, and hydroxypropyl cellulose (140,000MW) marketed under the tradename of KlucelTM Type JF NF, and wherein the film substrate comprises hydroxypropyl cellulose of three molecular weights: hydroxypropyl cellulose (40,000MW), hydroxypropyl cellulose (140,000MW), and hydroxypropyl cellulose (370,000MW) marketed under the tradename of KlucelTM Type GF NF. In some embodiments, the film substrate also comprises polyethylene oxide (600,000MW) available under the name of Sentry Polyox WSR 205 LEO NF.

[0383] In embodiments, the dry film product comprises a deposition composition (also referred to herein as a “dexmedetomidine composition”) comprising: (i) dexmedetomidine hydrochloride, present at about 9% to about 50% w / w of the deposition composition, e.g. about 15% to about 25% w / w of the deposition composition; (ii) hydroxypropyl cellulose (40,000MW), present at about 5% to about 85% w / w of the deposition composition; (iii) hydroxypropyl cellulose (140,000MW) present at about 5% to 85% w / w of the deposition composition; and (iv) hydroxypropyl cellulose (370,000MW) present at about 0% to about 65% w / w of the deposition composition. The film also comprises a polymer matrix, wherein the polymer matrix comprises: (i) hydroxypropyl cellulose (40,000MW) present at about 3% to about 40% w / w of the polymer matrix; (ii) hydroxypropyl cellulose (140,000MW) present at about 3% to about 40% w / w of the polymer matrix; (iii) hydroxypropyl cellulose (370,000MW)Attorney Docket No.: BXTI-059 / 02WO 332712-2423 present at about 0% to about 30% w / w of the polymer matrix, and (iv) polyethylene oxide (600,000MW) present at about 55% to about 75% w / w of the polymer matrix.

[0384] In embodiments, the dry film product (e.g. a micro-deposited film product) comprises(i) dexmedetomidine hydrochloride, present at about 1% to about 50% w / w of the total film weight; (ii) hydroxypropyl cellulose (40,000MW), present at about 2% to about 30% w / w of the total film weight ; (iii) hydroxypropyl cellulose (140,000MW) present at about 2% to about 30% w / w of the total film weight ; (iv) hydroxypropyl cellulose (370,000MW) present at about 10% to about 50% w / w of the total film weight , (v) polyethylene oxide (600,000MW) present at about 40% to about 75% w / w of the total film weight and (vi) optionally other pharmaceutically acceptable carriers.

[0385] In embodiments, the films disclosed herein combine several types of hydroxypropyl cellulose (HPC) to provide a film with advantageous properties. For example, the film composition may contain two or three of hydroxypropyl cellulose (40,000MW), hydroxypropyl cellulose (140,000MW) and hydroxypropyl cellulose (370,000MW) in combination. In some embodiments, polyethylene oxide (600,000MW) is included with these types of HPC when part of a monolithic film.

[0386] In certain film compositions of the present disclosure, a low molecular weight hydroxypropyl cellulose (e.g. 40,000MW) is present at about 3% to about 8% (e.g. about 5%) w / w of the total film weight, a high molecular weight hydroxypropyl cellulose (e.g. 140,000MW) is present at about 3% to about 8% (e.g. about 5%) w / w of the total film weight, a high molecular weight hydroxypropyl cellulose (e.g.370,000MW) is present at about 20% to about 40% w / w of the total film weight, and a polyethylene oxide (e.g.600,000MW) is present at about 40% to about 70%, (e.g. about 50% to about 60%) w / w of the total film weight. In some embodiments, the two high molecular weight, water-soluble polymers are together present at about 25% to about 40% w / w of the total film weight.

[0387] The selection and ratio of water-soluble polymers can be made to effect complete dissolution of the film composition in oral mucosal fluids within seconds to minutes, e.g., in about 0.25 minutes to about 15 minutes, thus ensuring delivery of a therapeutically effective amount of dexmedetomidine or a pharmaceutically acceptable salt thereof via the oral mucosa. For example, the film compositions may reside in the sublingual or buccal region of the mouth up to about 15 minutes, up to about 10 minutes, or up to about 5 minutes, including for a period of from about 30 seconds to about 15 minutes, about 1 minute to about 10 minutes, or about 1 minute to about 5 minutes.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0388] The standard basket or paddle apparatus described in any pharmacopoeia can be used for in vitro dissolution testing. The selection of dissolution medium will essentially depend as per the sink conditions and highest dose of drug. The temperature of dissolution medium should be maintained at 37 ± 0.5°C and rpm at 50 (see Bala et al., in Int J Pharm Investigation, vol. 3(2), pages 67-76).

[0389] Films disclosed herein have several functional advantages to promote rapid onset of drug effect. In some embodiments, thin films compositions of the disclosure have a disintegration time (DT) of about 15 seconds to about 180 seconds, about 15 seconds to about 160 seconds, about 25 seconds to about 150 seconds, about 15 seconds to about 140 seconds, about 15 seconds to about 120 seconds, about 40 seconds to about 120 seconds, about 50 seconds to about 120 seconds, for example about 120 seconds, when applied sublingually or buccally. A disintegration time in this timeframe provides optimal onset of drug effects.

[0390] In embodiments, thin film compositions of the invention have mucoadhesion properties that provide practical benefits of localizing the film to the oromucosal (e.g., buccal or sublingual) location and reducing, or preventing, effective removal prior to dissolution. This quality is particularly advantageous in a clinical setting with an agitated subject. Thus, in embodiments, thin film compositions have a mucoadhesion force (the mucoadhesion strength or shear strength) of about 50g or above, about 100g or above, about 200g or above, about 300g or above, about 400g or above, about 500g or above, about 600g or above, about 700g or above, about 800g or above, about 900g or above, about 1000g or above. In embodiments, the mucoadhesion force is in a range of about 300g to about 4000g, about 500g to about 3000g, or about 1000g to about 2000g.

[0391] Burst strength of the film also contributes to drug delivery. Certain thin film compositions of the invention have a burst strength at or above 50g, 100g, 200g, 300g, 400g, 500g, 600g, 700g, 800g, 900g, 1000g, 1100g, 1200g, 1300g, 1400g, 1500g, 1600g, 1700g, 1800g, 1900g, 2,000 g, 2,500g, 3,000g, 3,500g, 4,000g, 4,500g, 5,000g, 5,500g, 6,000g, 6,500g, 7,000g, 7,500g, 8,000g, 8,500g, 9,000g, 9,500g, 10,000g or 15,000g. For example, the burst strength may be in a range of about 200g to about 15000 g, about 300 g to about 10,000 g, or about 400 g to about 5,000 g. Pharmaceutically acceptable carriers

[0392] The film compositions may further comprise one or more pharmaceutically acceptable carriers that includes, but is not limited to, liquid carriers, flavors, sweeteners, refreshing agents, antioxidants, pH adjusting agents, permeation enhancers, mucoadhesive agents,Attorney Docket No.: BXTI-059 / 02WO 332712-2423 plasticizers, bulking agents, surfactants / non-ionic solubilizers, stabilizers, anti-foam agents, colors or the like. In embodiments, the film compositions are substantially free of acidic buffer or other acidic agents. Liquid carriers

[0393] According to embodiments, the pharmaceutically acceptable carrier includes a liquid carrier. The liquid carrier comprises one or more solvents useful in the preparation of the polymer matrix (drug containing or placebo) and deposition composition on the polymer matrix. In embodiments, the solvent may be water. In embodiments, the solvent may a polar organic solvent including, but are not limited to, ethanol, isopropanol, acetone, butanol, benzyl alcohol and mixtures thereof. In embodiments, the solvent may be a non-polar organic solvent, such as methylene chloride, toluene, ethyl acetate and mixtures thereof. Certain solvents are alcohols, especially ethanol, water and mixtures thereof. Desirably, the solvent content in the wet polymer matrix is at least about 30% by weight of the total wet weight of the total film composition prior to drying. The subsequent dried film composition will desirably contain less than about 10% by weight of solvent, more desirably less than about 8% by weight of solvent, even more desirably less than about 6% by weight of solvent and most desirably less than about 2% by weight of solvent. Flavors / sweeteners / refreshing agents

[0394] It may be beneficial to add a sweetener, flavoring agent, refreshing agent, taste-masking agent or a combination thereof to the film compositions to improve the film composition taste. Flavors may be chosen from natural and synthetic flavoring liquids. An illustrative list of such agents includes volatile oils, synthetic flavor oils, flavoring aromatics, oils, liquids, oleoresins or extracts derived from plants, leaves, flowers, fruits, stems and combinations thereof. Non- limiting flavor oils include: spearmint oil, cinnamon oil, peppermint oil, clove oil, bay oil, thyme oil, cedar leaf oil, oil of nutmeg, oil of sage, and oil of bitter almonds. In some embodiments, the flavor is a peppermint oil flavor available as peppermint oil, NF.

[0395] The amount may be varied in order to obtain the result desired in the final product. Such variations are within the capabilities of those skilled in the art without the need for undue experimentation. In general, amounts of about 0.1 % to about 30 wt % may be used in the films to supply flavoring. Suitable sweeteners include both natural and artificial sweeteners. Non- limiting examples of suitable sweeteners include, e.g.: water-soluble sweetening agents such as monosaccharides, disaccharides and polysaccharides such as xylose, ribose, glucoseAttorney Docket No.: BXTI-059 / 02WO 332712-2423 (dextrose), mannose, galactose, fructose (levulose), sucrose (sugar), high fructose corn syrup, maltose, invert sugar (a mixture of fructose and glucose derived from sucrose), partially hydrolyzed starch, corn syrup solids, and dihydrochalcones; water-soluble artificial sweeteners such as the soluble saccharin salts, i.e., sodium or calcium saccharin salts, cyclamate salts and water-soluble sweeteners derived from naturally occurring water-soluble sweeteners, such as a chlorinated derivatives of ordinary sugar (sucrose), known, for example, as sucralose. In some embodiments, the sweetener is sucralose.

[0396] Flavoring agents, sweeteners and refreshing agents can be added in conventional quantities, generally up to a total amount of about 0.01% to about 10% of the weight of the film on a dry weight basis, e.g., from about 0.1% to about 7% of the weight of the film on a dry weight basis, e.g. about 0.1% to about 5% based on the weight of the film on a dry weight basis.

[0397] Other taste-masking agents include, for example polymers, oils, or waxes. In embodiments, dexmedetomidine or a pharmaceutically acceptable salt thereof is coated with a taste-masking agent prior to formulation of the film compositions. In embodiments, if a taste- masking agent is used to coat the active ingredient, it may be present in an amount of from about 5% to about 80% by weight of the particle or granule containing the active ingredient. In embodiments, the taste-masking agent is present in an amount from about 25% to about 35% by weight of the particle or granule containing the active ingredient. Antioxidants

[0398] Examples of oxygen scavengers or antioxidants that substantially improve long-term stability of the film composition against oxidative degradation include sulfite salts, such as sodium sulfite, sodium bisulfite, sodium metabisulfite and analogous salts of potassium and calcium. A suitable amount of the sulfite salt (e.g., sodium sulfite) is up to about 5%, e.g. about 0.001% to about 2% based on the weight of the film composition on a dry weight basis. pH-adjusting agents / pH-neutralizing agents

[0399] The absorption of dexmedetomidine or a pharmaceutical acceptable salt thereof through the oral mucosa may increase in an alkaline microenvironment. As an example, this may be achieved when the film compositions are maintained at a pH of above 6, from about 6 to about 9, or about 6.5 to about 8. In embodiments, the film may include an alkaline substance that increases the pH of the film product. Non-limiting examples of pH-adjusting / pH-neutralizing agents include bicarbonates (e.g., sodium bicarbonate), citrates (e.g., potassium citrate), carbonates (e.g., calcium carbonate), lactates (e.g., sodium lactate), acetates (e.g., calciumAttorney Docket No.: BXTI-059 / 02WO 332712-2423 acetate), alkaline buffer (e.g., glycine), sodium hydroxide, sodium chloride or the like. An alkaline buffer, such as glycine, is one example of a pH-neutralizing agent. A suitable amount of pH-adjusting / pH-neutralizing agent present in the film composition includes, for example, up to about 10%, e.g., about 1% to about 5% based on the weight of the film composition on a dry weight basis Permeation enhancer agents

[0400] Certain effective penetration enhancers that promote absorption of dexmedetomidine or a pharmaceutically acceptable salt thereof across the oral mucosa include alcohols. An alcohol penetration enhancer, such as butanol, can conveniently be added to the film composition in an amount of up to about 10%, e.g., about 0.1% to about 5%, e.g. about 1% to about 3% based on the weight of the film composition on a dry weight basis. Mucoadhesive agents

[0401] Examples of mucoadhesive agents that can be added to the film composition include, but are not limited to, sodium alginate, sodium carboxymethyl cellulose, guar gum, polyethylene oxide, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, karaya gum, methylcellulose, retene, tragacanth and the like. One mucoadhesive agent is polyethylene oxide, which may conveniently be added to the film composition in an amount of from about 20% to about 90%, e.g., about 40% to about 70% based on the total weight of the film composition on a dry weight basis. Plasticizers

[0402] Plasticizers that can be effectively employed herein include polyethylene glycol, propylene glycol, tributyl citrate, triethyl citrate and glycerol. Depending on the selected film- forming polymer(s) and other components of the film formulation, a suitable amount of plasticizer included in the film composition may typically be up to about 10%, e.g. about 0.1% to about 5%, e.g. about 0.5% to about 5% based on the weight of the film on a dry weight basis. For certain applications, higher molecular weight polyethylene glycols may be utilized, including polyethylene oxide Fillers

[0403] Suitable fillers that can be added to a film composition of include starch, calcium salts, such as calcium carbonate, and sugars, such as lactose, glucose, sucrose, mannose, sorbitol, mannitol, galactitol, sucralose, trehalose and combinations thereof. The amount of filler thatAttorney Docket No.: BXTI-059 / 02WO 332712-2423 can conveniently be added to the film formulation is typically up to about 25%, e.g. about 0.5% to about 20%, e.g. about 1% to about 15%, e.g. about 2% to about 10%, based on the weight of the film composition on a dry weight basis. Surfactants / Non-ionic solubilizers

[0404] The film typically incorporates at least one surfactant / non-ionic solubilizer including, for example, but are not limited to, a poloxamer, polyoxyl hydrogenated castor oil, glyceryl polyethylene glycol oxystearates, fatty acid glyceryl polyglyceryl esters, polyglyceryl esters, and combinations thereof. The amount of surfactant(s) that can be added to the film composition is typically up to about 5%, e.g. about 0.5% to about 3%, e.g. about 1% to about 3% based on the weight of the film composition on a dry weight basis. Anti-foaming components

[0405] Simethicone is an example of a useful anti-foaming and / or de-foaming agent, although other anti-foaming and / or de-foaming agents may suitable be used. An anti-foaming and / or de- foaming agent such as simethicone may be added to the film composition in an amount from about 0.01 % to about 5.0%, more desirably from about 0.05% to about 2.5%, and most desirably from about 0.1% to about 1.0% based on the weight of the film composition on a dry weight basis. Colorants

[0406] Color additives that may be included in a film composition include food, drug and cosmetic colors (FD&C), drug and cosmetic colors (D&C), or external drug and cosmetic colors (Ext. D&C). These colors are dyes, their corresponding lakes, and certain natural and derived colorants. Certain examples of color additives are inorganic pigments, such as oxides of iron or titanium, added in concentrations ranging from about 0.001% to about 10%, e.g., about 0.01% to about 3%, based on the weight of the film composition on a dry weigh basis. In embodiment, the color used for the dexmedetomidine composition (i.e., the deposit composition) is different from the color used for the film substrate (e.g. the placebo film). One color of the monolithic film and the film substrate of the micro-deposited film is emerald green, and available as Fast Emerald Green Shade (06507). One color of the dexmedetomidine composition (i.e., the deposit composition) is a different color from the color of the film substrate, e.g., blue (available as FD&C Blue No.1). In embodiments of the film embodiments of the present disclosure, for example, as described in aspects and embodiments hereinabove, is a film comprising about 180 μg of dexmedetomidine or a pharmaceutically acceptable saltAttorney Docket No.: BXTI-059 / 02WO 332712-2423 thereof containing two blue color microdeposited spots of dexmedetomidine hydrochloride on the green color film substrate.

[0407] In embodiments of the film embodiments of the present disclosure, for example, as described in aspects and embodiments hereinabove, is a film comprising about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0408] In one embodiment (A), there is provided a self-supporting, dissolvable, film, comprising: (i) about 180 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0409] In another embodiment (B), there is provided a self-supporting, dissolvable, film, comprising: (i) about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0410] In another embodiment (C), there is provided a self-supporting, dissolvable, film, comprising: (i) about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0411] In another embodiment (D), there is provided a self-supporting, dissolvable, film, comprising: (i) about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0412] In another embodiment (E), there is provided a self-supporting, dissolvable, film, comprising: (i) about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0413] In another embodiment (F), there is provided a self-supporting, dissolvable, film, comprising: (i) about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0414] In another embodiment (G), there is provided a self-supporting, dissolvable, film, comprising: (i) about 20 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0415] In another embodiment (H), there is provided a self-supporting, dissolvable, film, comprising: (i) about 10 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) one or more water-soluble polymers; (iii) a polyethylene oxide and, optionally, (iv) one or more pharmaceutically acceptable carriers.

[0416] In a particular embodiment, the one or more water-soluble polymers (ii) of embodiments (A) - (H) above comprises a low molecular weight, water-soluble polymer and two high molecular weight, water-soluble polymers, for example wherein the low molecular weight, water-soluble polymer has a molecular weight from about 5,000 Daltons to about 49,000 Daltons (e.g. about 40,000 Daltons), and each high molecular weight, water-solubleAttorney Docket No.: BXTI-059 / 02WO 332712-2423 polymer has a molecular weight of greater than about 60,000 Daltons (e.g. where one of the two high molecular weight, water-soluble polymers has a molecular weight of about 140,000 Daltons, and the other high molecular weight, water-soluble polymer has a molecular weight of about 370,000 Daltons). Each water-soluble polymer is, in some embodiments, hydroxypropyl cellulose. The polyethylene oxide, in some embodiments, has a molecular weight of about 600,000 Daltons.

[0417] In certain embodiments, there is provided a pharmaceutical film composition comprising or consisting essentially of therapeutically effective amount of dexmedetomidine or pharmaceutically acceptable salt thereof and one or more excipients selected from polyethylene oxide, hydroxypropyl cellulose, sucralose, peppermint oil, Emerald green colorant, and FD&C blue colorant.

[0418] In another embodiment (I), there is provided a self-supporting, dissolvable, film, comprising: (i) about 180 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0419] In another embodiment (J), there is provided a self-supporting, dissolvable, film, comprising: (i) about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; andAttorney Docket No.: BXTI-059 / 02WO 332712-2423 (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0420] In another embodiment (K), there is provided a self-supporting, dissolvable, film, comprising: (i) about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0421] In another embodiment (L), there is provided a self-supporting, dissolvable, film, comprising: (i) about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0422] In another embodiment (M), there is provided a self-supporting, dissolvable, film, comprising: (i) about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons;Attorney Docket No.: BXTI-059 / 02WO 332712-2423 (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0423] In another embodiment (N), there is provided a self-supporting, dissolvable, film, comprising: (i) about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0424] In another embodiment (O), there is provided a self-supporting, dissolvable, film, comprising: (i) about 20 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0425] In another embodiment (P), there is provided a self-supporting, dissolvable, film, comprising:Attorney Docket No.: BXTI-059 / 02WO 332712-2423 (i) about 10 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g. the hydrochloride salt); (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons; (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0426] In a particular embodiment of the just-mentioned films of embodiments (I) and (P), the film components excluding dexmedetomidine or a pharmaceutically acceptable salt thereof form a single layer film substrate, and dexmedetomidine or a pharmaceutically acceptable salt thereof is present on the surface of the film substrate (e.g., within a composition comprising dexmedetomidine or a pharmaceutically acceptable salt thereof, a low molecular weight, water- soluble polymer having a molecular weight of about 40,000 Daltons, and a high molecular weight, water-soluble polymer having a molecular weight of about 140,000 Daltons). Each water-soluble polymer is, in some embodiments, hydroxypropyl cellulose.

[0427] In embodiment (Q), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 180 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); and (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0428] In embodiment (R), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 120 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); andAttorney Docket No.: BXTI-059 / 02WO 332712-2423 (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0429] In embodiment (S), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 90 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); and (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0430] In embodiment (T), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 80 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); and (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0431] In embodiment (U), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 60 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); andAttorney Docket No.: BXTI-059 / 02WO 332712-2423 (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0432] In embodiment (V), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 40 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); and (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0433] In embodiment (W), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 20 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); and (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0434] In embodiment (X), there is provided a self-supporting, dissolvable, film, comprising: (a) a composition consisting essentially of: (i) about 10 μg of dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); andAttorney Docket No.: BXTI-059 / 02WO 332712-2423 (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate consisting essentially of: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0435] In a particular embodiment of the just-mentioned films of embodiments (Q) and (X), dexmedetomidine hydrochloride is present at about 0.1% to about 2% w / w of the total film weight, hydroxypropyl cellulose (40,000MW) is present at about 4% to about 8 % w / w of the total film weight, hydroxypropyl cellulose (140,000MW) is present at about 4% to about 8 % w / w of the total film weight, hydroxypropyl cellulose (370,000MW) is present at about 25 % to about 30% w / w of the total film weight, and polyethylene oxide (600,000MW) is present at about 50% to about 60% w / w of the total film weight.

[0436] In embodiments, the pharmaceutical composition of the present disclosure provides detectable Cmax of dexmedetomidine in human plasma concentration after single dose administration and multiple dose administrations of the pharmaceutical composition of the present disclosure. In embodiments, the pharmaceutical composition of the present disclosure provides a Tmaxof dexmedetomidine in human plasma concentration after a single dose administration or multiple dose administrations of the pharmaceutical composition of the present disclosure. In embodiments, pharmaceutical compositions of the present disclosure provide detectable Area Under the Curve (AUC) of dexmedetomidine and its metabolites in human plasma concentration after single dose administration or multiple dose administrations. In some embodiments, the AUC of dexmedetomidine (or its metabolites) is measured from time 0 (the time of administration) to 24 hours from the time 0 and is expressed as AUC0-24h.. In embodiments, the AUC of dexmedetomidine (or its metabolites) is measured from time 0 (the time of administration) to time extrapolated to infinity and is expressed as AUC0-Inf. In embodiments, the ranges and values for AUC0-last and AUC0-Inf for dexmedetomidine (or its metabolites) are similar to the ranges and values for AUC0-6h for dexmedetomidine (or its metabolites).In embodiments, the present disclosure provides pharmaceutical buccal film compositions comprising or consisting essentially of therapeutically effective amount of dexmedetomidine or pharmaceutically acceptable salt thereof, one or more mucoadhesive polymers and optional excipients selected from one or more of plasticizers, penetrationAttorney Docket No.: BXTI-059 / 02WO 332712-2423 enhancers, coloring agents, sweetening agents, flavoring agents, taste-making agents or salivary stimulants. Mucoadhesive polymers may be selected from hydrophilic polymers and hydrogels. Examples of hydrophilic polymers include polyvinyl alcohol [PVA], sodium carboxy methylcellulose, hydroxyl propyl methyl cellulose [HPMC], hydroxyl ethyl cellulose and hydroxypropyl cellulose [HPC]. Examples of hydrogels include anionic polymers like Carbopol, polyacrylates, cationic polymers like chitosan and non-ionic polymers like Eudragit analogues. Sprays, drops or gels

[0437] In embodiments, the present disclosure provides pharmaceutical spray compositions or drop compositions suitable for sublingual or buccal administration comprising or consisting essentially of a therapeutically effective amount of dexmedetomidine or pharmaceutically acceptable salt thereof and one or more pharmaceutically acceptable liquids (from about 1% to about 99.995% by weight). Such liquids may be solvents, co-solvents, or non-solvents for dexmedetomidine or a pharmaceutically acceptable salt thereof. Examples of pharmaceutically acceptable liquids include water, ethanol, dimethyl sulfoxide, propylene glycol, polyethylene glycol, propylene carbonate, glycerin, N-methylpyrrolidone, pharmaceutically acceptable oils (e.g., soybean, sunflower, peanut, etc.) or the like. The pharmaceutically acceptable liquid is selected either to dissolve dexmedetomidine or pharmaceutically acceptable salt thereof, to produce a stable, homogenous suspension of it, or to form any combination of a suspension or solution. In addition to these ingredients, spray or drop formulations of dexmedetomidine or pharmaceutically acceptable salt thereof may include one or more excipients such as viscosity modulating materials (e.g. polymers, sugars, sugar alcohols, gums, clays, silicas, and the like, such as polyvinylpyrrolidone (PVP)); preservatives (e.g., ethanol, benzyl alcohol, propylparaben and methylparaben); flavoring agents (e.g. peppermint oil), sweeteners (e.g., sugars such as sucrose, glucose, dextrose, maltose, fructose, etc.), artificial sweeteners (e.g. saccharin, aspartame, acesulfame, sucralose), or sugar alcohols (e.g. mannitol, xylitol, lactitol, maltitol syrup); buffers and pH-adjusting agent (e.g., sodium hydroxide, citrate, and citric acid); coloring agents; fragrances, chelating agents (e.g., EDTA); UV absorbers and antifoam agents (e.g., low molecular weight alcohols, dimethicone). In addition to one or more of the aforementioned ingredients suitable for sublingual or buccal sprays or drops, gel formulations of dexmedetomidine or pharmaceutically acceptable salt thereof may include one or more excipients such as viscosity modulating materials (e.g. water soluble or water swellableAttorney Docket No.: BXTI-059 / 02WO 332712-2423 polymers such as carbopol, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose).

[0438] Sprays, drops, and gels may be made by mixing appropriate quantities of the foregoing ingredients in accordance with standard good manufacturing practices. Such excipients may be included in the formulation to improve patient or subject acceptance or taste, to improve bioavailability, to increase shelf-life, to reduce manufacturing and packaging costs, to comply with requirements of governmental regulatory agencies, and for other purposes. The relative amounts of each ingredient should not interfere with the desirable pharmacological and pharmacokinetic properties of the resulting formulation.

[0439] In embodiments, there is provided an oromucosal spray composition comprising or consisting essentially of therapeutically effective amount of dexmedetomidine or pharmaceutically acceptable salt thereof and one or more pharmaceutically acceptable carrier or excipients.

[0440] In embodiments, a patient is treated by sublingually or buccally administering 1 to 2 actuations from a spray pump. An advantage of spray delivery is the ability to easily titrate patients by 1 or 2 doses as required by a single actuation.

[0441] Pump action sprays are characterized in requiring the application of external pressure for actuation, for example, external manual, mechanical or electrically initiated pressure. This is in contrast to pressurized systems, e.g., propellant-driven aerosol sprays, where actuation is typically achieved by controlled release of pressure e.g., by controlled opening of a valve.

[0442] Various oromucosal spray formulations comprising dexmedetomidine hydrochloride at doses of about 10 Pg, about 20 μg, about 30 μg, about 40 μg, about 60 μg, about 80 μg, about 90 μg, about 120 μg, about 180 μg and about 240 μg and excipients as described in table 1. Table 1. Oromucosal spray formulation embodiments according to the disclosureAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0443] Various oromucosal drop compositions comprising dexmedetomidine hydrochloride at doses of about 10 μg, about 20 μg, about 30 μg, about 40 μg, about 60 μg, about 90 μg, about 120 μg, 180 μg, and about 240 μg and excipients as described in table 2. Table 2. Oromucosal drop formulations embodiments according to the disclosureAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0444] Various oromucosal gel compositions comprising dexmedetomidine hydrochloride at doses of 20 μg, 30 μg, 40 μg, 60 μg, 90 μg, 120 μg, 180 μg and 240 μg, and excipients as described in table 3. Table 3. Oromucosal gel formulations embodiments according to the disclosure.Attorney Docket No.: BXTI-059 / 02WO 332712-2423 Tablets

[0445] In embodiments, the present disclosure provides tablet formulations suitable for oromucosal administration (e.g., sublingual or buccal administration) comprising or consisting essentially of therapeutically effective amount of dexmedetomidine or pharmaceutically acceptable salt thereof and one or more pharmaceutically acceptable carrier (from about 1% to about 99.995% by weight). Such carriers may be taste masking agents, diluents, disintegrants, binders, lubricants, glidants, flavoring agents or liquid solvents. Examples of pharmaceutically acceptable liquids include water, ethanol, dimethyl sulfoxide, propylene glycol, polyethylene glycol, propylene carbonate, glycerine, N-methylpyrrolidone, pharmaceutically acceptable oils (e.g., soybean, sunflower, peanut, etc.) or the like. Taste masking agents include, for example, amberlite, Opadry®AMB TAN, polymethacrylates (especially Eudragit®L100), sodium starch glycolate (Primojel), carbopol polymers, PEG-5M, sodium acetate, ethylcellulose, betacyclodextrin. Flavouring agents may be, for example, mint powder, menthol, vanillin, aspartame, acesulfame potassium, saccharin. Disintegrants include, for example, sodium starch glycolate, low-substituted hydroxy propyl cellulose, alginic acid, carbon dioxide, carboxymethylcellulose calcium, carboxymethylcellulose sodium, croscarmellose sodium, guar gum, methylcellulose, polacrilin potassium, poloxamer, sodi.um alginate. Diluents may be, for example, microcrystalline cellulose, dextrates, dextrose, fructose, mannitol, sucralose, sorbitol, starch, pregelatinized starch, sucrose, xylitol, maltose, maltodextrin, maltitol. Binders may be, for example, alginic acid, carbomer, ethyl cellulose, gelatine, liquid glucose, guar gum, hydroxyethyl cellulose, methylcellulose, polydextrose, polyethylene oxide, hydroxypropyl methylcellulose, hydroxypropyl cellulose, sodium alginate. At least one lubricant may conveniently be incorporated into the formulation to prevent the powder from adhering to tablet punches during the compression procedure. Lubricants may be, for example, talc, magnesium stearate, calcium stearate, glyceryl behenate, hydrogenated castor oil, stearic acid, sodium lauryl sulphate. Glidants are used to promote powder flow by reducing interparticle friction and cohesion. These are used in combination with lubricants as they have no ability to reduce die wall friction. Glidants, may be, for example, colloidal silicon dioxide, calcium silicate, calcium phosphate tribasic.

[0446] Various buccal tablet formulations comprising dexmedetomidine hydrochloride at doses of 20 μg, 30 μg, 40 μg, 60 μg, 90 μg, 120 μg, 180 μg and 240 μg and excipients as described in table 4.Attorney Docket No.: BXTI-059 / 02WO 332712-2423 Table 4. Buccal tablet formulation embodiments according to the disclosure.

[0447] Various oromucosal tablet compositions comprising dexmedetomidine hydrochloride at doses of 20 μg, 30 μg, 40 μg, 60 μg, 90 μg, 120 μg, 180 μg and 240 μg and excipients as described in table 5. Table 5. Oromucosal tablet formulation embodiments according to the disclosure.Attorney Docket No.: BXTI-059 / 02WO 332712-2423Intranasal Formulations

[0448] The compositions of the disclosure may be administered to the nasal cavity in any suitable form. For example, the composition may be administered to the nasal cavity in the form of a spray emulsion, suspension or solution, as drops or as a powder.

[0449] A powder blend according to the present disclosure may be prepared by mixing dexmedetomidine or a pharmaceutically acceptable salt thereof with inert ingredients that are standard in the art. Such inert ingredients include, but are not limited to diluents such as calcium phosphate, lactose, sugars such as dextrose and sucrose, polyols such as mannitol and sorbitol, and microcrystalline cellulose, glidants such as colloidal silica and lubricants such as magnesium stearate and hydrogenated vegetable oil and surfactants such as polysorbates; and polyethylene glycol. For preparing a uniform powder blend on a small scale, a pestle and mortar and / or sieve may be appropriate whereas mechanical mixers are required for larger scale manufacture. There are numerous types of mixers available and these are widely described in the literature, for example Chapter 37, Remington: The Science and Practice of Pharmacy, 20 Edition, Lipincott, Williams and Wilkins, Baltimore, 2000.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0450] If the powder composition of the disclosure comprises granules, these granules may be produced by techniques well known to those skilled in the art such as wet granulation, dry granulation (slugging), extrusion / spheronisation, fluid bed granulation and spray congealing. Further details on granulation processes may be found in the literature, for example Chapter 6, Pharmaceutical Principles of Solid Dosage Forms, J. T. Carstensen, Technomic, Lancaster, PA, 1993.

[0451] In addition to dexmedetomidine or a pharmaceutically acceptable salt thereof, other ingredients may be incorporated into the granules. Such other ingredients include but are not limited to diluents such as calcium phosphate, lactose, dextrose, mannitol and microcrystalline cellulose, binders such as povidone (polyvinylpyrrolidone), methylcellulose, polyethylene glycol, gelatin and acacia, disintegrants such as starch, croscarmellose and crospovidone, glidants such as colloidal silica, and lubricants such as magnesium stearate and hydrogenated vegetable oil. Methods for preparation of microspheres are well known to those skilled in the art and include, but are not limited to, spray drying, interfacial polymerisation, coarcervation / phase separation and solvent evaporation. Methods for producing microspheres are described in, for example, Physicochemical Principles of Pharmacy, 3rd Edition, pages 357 to 360, A T Florence and D Attwood, Macmillan, London, 1998 and Physical Pharmacy, 4th Edition, pages 516 to 519, A Martin, Wilkins and Wilkins, Baltimore, 1993. The microspheres may alternatively be produced using the methods described in W098 / 30207 and the documents cited therein.

[0452] The powder compositions of the present disclosure may be administered to the subject in aerosolized form whereby energy from patient inhalation (sniffing) is used to aerosolize the powder into the nasal cavity or where the device itself provides the aerosolization energy, such as via compressed air. An example of the former device is manufactured by Pfeiffer and an example of the latter is the "Monopowder" manufactured by Valois. The present disclosure also provides a nasal drug delivery device or a dose cartridge for use in a nasal delivery device loaded with a composition as defined above.

[0453] In embodiments, the compositions of the disclosure also disclose the process for preparing the solutions of the disclosure comprises mixing the components in a suitable solvent such as water, ethanol, propylene glycol, polyethylene glycol, glycofurol, benzyl benzoate and polyoxyethylene castor oil derivatives. The compositions may be prepared using methods known in the art.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0454] The solutions of the present disclosure may also contain other pharmaceutically acceptable ingredients well known in the art. Such ingredients include, but are not limited to, thickening, adhesive or gelling agents, such as, but are not limited to, celluloses (e.g. hydroxypropyl methylcellulose, methylcellulose, hydroxypropyl cellulose and microcrystalline cellulose), carbomers, polyethylene oxide, poloxamers or polyethylene glycols, antioxidants (for example sodium metabisulphite), chelating agents (such as edetic acid or one of its salts), preservatives (such as potassium sorbate, parabens, phenylethyl alcohol or benzalkonium chloride), flavors, sweeteners, thickening, adhesive or gelling agents, including, but are not limited to, celluloses such as hydroxypropyl methylcellulose, methylcellulose, hydroxypropyl cellulose, sodium carboxyl cellulose and microcrystalline cellulose, poloxamers, polyethylene glycols, carbomers or polyethylene oxide.

[0455] The solutions of the disclosure may contain a preservative and / or are sterile. If preservatives are omitted from the compositions, microorganisms may be removed using any suitable method known in the art, for example by making the compositions aseptically or by terminally sterilizing them. In some embodiments, the compositions of the invention are non- pyrogenic.

[0456] In embodiments, intranasal compositions of the present disclosure comprise aqueous suspension, solution, or emulsion containing materials in addition to the active ingredient, such as suitable dispersant and / or wetting agent, for example propylene glycol or polyethylene glycol, emulsifier, suspending agent, surfactant, solubilizer, vehicle etc.

[0457] The pharmaceutical composition may also be formulated as liposomes, microcapsules or centrosomes, with one or more suitable pharmaceutically acceptable carrier.

[0458] In addition to dexmedetomidine or a pharmaceutically acceptable salt thereof, microspheres used in the present disclosure may include ingredients that are known in the art to be suitable to be included in microspheres such as, but are not limited to, starches, dextrans, gelatin, albumin, collagen, hyaluronic acid, chitosan, lactose, sucrose, dextrose, mannitol, methacrylate copolymers such as the Eudragit® polymers (Degussa, Germany), celluloses such as methylcellulose, and polyesters such as poly(lactide-co-glycolide).

[0459] Any device that is suitable for intranasal administration can be used. In embodiments, the device is a metered dose device. Examples of a metered dose device include, but are not limited to, a spray pump, a pre-compression nasal spray pump, a metered valve device, an actuated spray device, a side actuated spray device, a syringe nasal spray device (e.g. a syringe that has an atomizer to deliver a spray to the nasal cavity), a mucosal atomization device, anAttorney Docket No.: BXTI-059 / 02WO 332712-2423 electromechanical pump device (with and without a counter), and the like. Examples of metered dose devices also include, but are not limited to, devices manufactured by Aptar Pharma (Congers, NY) and are commercially available. Examples of metered dose devices also include, but are not limited to, UDS (Aptar Pharma), BDS (Aptar Pharma), eDevices (Aptar Pharma), Equadel (Aptar Pharma), Latitude (Aptar Pharma), DF30 (Aptar Pharma), VP7 (Aptar Pharma), Classic Nasal Device (Aptar Pharma), MAD Nasal Drug Device (Wolf Tory Medical, Inc.), BD Accuspray SCF™ (Becton Dickinson), and the like. Another example includes, but is not limited to, an Aptar Unitdose Intranasal System. Parenteral formulations

[0460] Liquid pharmaceutical compositions for parenteral administration may be formulated for administration by injection or continuous infusion. Routes of administration by injection or infusion can include, but are not limited to, intravenous, intraperitoneal, intramuscular, intrathecal, and subcutaneous. In embodiments, parenteral formulations can include prefilled syringes, vials, powder for infusion for reconstitution, concentrate for infusion to be diluted before delivery (ready to dilute) or solutions (ready to use).

[0461] Injectable pharmaceutical compositions can be aqueous isotonic solutions or suspensions, and suppositories can be prepared from fatty emulsions or suspensions.

[0462] The pharmaceutical compositions may be sterilized and / or contain adjuvants, such as preserving, stabilizing, wetting or emulsifying agents, solution promoters, salts for regulating the osmotic pressure and / or buffers. In addition, they may also contain other therapeutically valuable substances.

[0463] In embodiments, the pharmaceutical compositions of the present disclosure include biodegradable subcutaneous implant, osmotically controlled device, subcutaneous implant, subcutaneous sustained release injection, lipid nanoparticles, liposomes, and the like. Liquid preparations can include, but are not limited to, solutions, suspensions and emulsions. Such preparations are exemplified by water or water / propylene glycol solutions for parenteral injection. Liquid preparations may also include solutions for intranasal administration.

[0464] For intramuscular, intraperitoneal, subcutaneous and intravenous use, sterile solutions of the active ingredient(s) are usually employed, and the pH of the solutions should be suitably adjusted and buffered. For intravenous use, the total concentration of the solute(s) should be controlled to render the preparation isotonic.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0465] The liquid vehicle used for the preparation of the intramuscular injection may be, for example, water, a saline solution, another aqueous liquid (aqueous solvent) or non-aqueous liquid (non-aqueous solvent).

[0466] The parenteral formulations of the present disclosure can be sterilized. Non-limiting examples of sterilization techniques include filtration through a bacterial-retaining filter, terminal sterilization, incorporation of sterilizing agents, irradiation, and heating.

[0467] Administration of the above-described parenteral formulations may be by periodic injections of a bolus of the preparation or may be administered by intravenous or intraperitoneal administration from a reservoir which is external (e.g., an intravenous bag) or internal (e.g., a bioerodable implant, a bioartificial or organ). See, e.g., U.S. Patent Nos. 4,407,957 and 5,798,113, each incorporated herein by reference in their entireties. Intrapulmonary delivery methods and apparatus are described, for example, in U.S. Patent Nos. 5,654,007, 5,780,014, and 5,814,607, each incorporated herein by reference in their entireties. Other useful parenteral delivery systems include ethylene-vinyl acetate copolymer particles, osmotic pumps, implantable infusion systems, pump delivery, encapsulated cell delivery, liposomal delivery, needle-delivered injection, needle-less injection, nebulizer, aerosolizer, electroporation, and transdermal patch. Needle-less injector devices are described in U.S. Patent Nos. 5,879,327; 5,520,639; 5,846,233 and 5,704,911, the specifications of which are herein incorporated herein by reference in their entireties. Any of the formulations described herein can be administered in these methods. Further injectable formulations of dexmedetomidine are disclosed in U.S. Patent No.8,242,158, U.S. Patent No.9,649,296, JP. Patent No.5,921, 928, JP. Pat. Appl. No. 2016154598, CN Pat. Appl. No.103284945, CN Pat. Appl. No.104161760, CN Pat. Appl. No. 105168122, CN Pat. Appl. No.105534891, CN Pat. Appl. No.106038538, U.S. Pat. Appl. No. 20170128421, CN Pat. Appl. No. 107028880, CN Pat. Appl. No. 107412152, CN Pat. Appl. No. 108498469, EP Patent. No. 2252290, JP. Pat. Appl. No. 2019048091 and U.S. Pat. Appl. No.20190183729.

[0468] The present disclosure includes intramuscular compositions comprising: dexmedetomidine, or a pharmaceutically acceptable salt thereof, at a concentration of between about 0.05 μg / mL and about 15 μg / mL, sodium chloride at a concentration of between about 0.01 and about 2.0 weight percent and pH in the range of about 1 to about 10. Oral formulationsAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0469] The present disclosure includes oral formulations that can be used for delivering dexmedetomidine. Examples of oral formulations includes tablets, orally disintegrating tablets, mouth dissolving tablets, wafers, solution, suspension, emulsions, and capsules.

[0470] The disclosure encompasses oral disintegrating tablets comprising dexmedetomidine or a pharmaceutically acceptable salt thereof and at least one orally disintegrating carrier, wherein the oral disintegrating tablet disintegrates in about 0.5 to about 120 seconds and / or a therapeutically effective amount of the dexmedetomidine is absorbed into the bloodstream within about 1 to about 5 minutes. In embodiments, a therapeutically effective amount of the dexmedetomidine is absorbed into the bloodstream within about 3 minutes.

[0471] In embodiments, the at least one orally disintegrating carrier is selected from the group consisting of water-soluble sugars or sugar alcohol, crospovidone, (low-substituted) hydroxypropyl cellulose, croscarmellose sodium, microcrystalline cellulose, lactose, pregelatinized starch, sodium starch glycolate, sodium lauryl sulphate, crystalline cellulose and the combination thereof. The water-soluble sugars or sugar alcohol is selected from the group consisting of sucrose, sorbitol, mannitol, xylitol, erythritol, isomalt and fructose. In embodiments, the orally disintegrating carriers together constitute at least 50 wt.%, for example at least 80 wt.% or at least 85 wt.% of the orally disintegrating carriers. The aforementioned carriers are in the form of particles typically have a volume weighted mean particle size of 50- 300 micrometers, for example of 70-200 micrometers. F-Melt® (Fuji Chemical Industry Co.) is an example of a commercially available particulate material that contains a disintegrating agent dispersed in a matrix containing C4-C6 sugar alcohol (mannitol and xylitol). Ludiflash® (BASF) is another example of a commercially available particulate material that contains a disintegrating agent dispersed in a matrix of C4-C6 sugar alcohol (mannitol).

[0472] The orally disintegrating tablet as used herein may be prepared by mixing the dexmedetomidine with water-soluble diluents and compressed in a tablet. A suspension comprising dexmedetomidine may be prepared with appropriate excipients and the dexmedetomidine suspension may be dispensed into blister packs and freeze-dried. An exemplary freeze-dried preparation platform that could be used for the dexmedetomidine ODT is the ZYDIS® (Catalent, Somerset, NJ, USA) formulation. In particular, the excipients, including water, are blended and the dexmedetomidine is separately milled to size and mixed with the excipients. The suspension then undergoes lyophilization by flash freezing and freeze drying. Other methods of preparing ODTs may be used without limitation, and detailed description of general methods thereof have been disclosed, for example, in U.S. Pat. NoAttorney Docket No.: BXTI-059 / 02WO 332712-2423 5,631,023; 5,837,287; 6,149,938; 6,212,791; 6,284,270; 6,316,029; 6,465,010; 6,471,992; 6,471,992; 6,509,040; 6,814,978; 6,908,626; 6,908,626; 6,982,251; 7,282,217; 7,425,341; 7,939,105; 7,993.674; 8,048,449; 8,127,516; 8,158,152; 8,221,480; 8,256,233; and 8,313,768, each of which is incorporated herein by reference in its entirety. Specific Embodiments

[0473] Embodiment 1. A method of treating an acute agitation episode in a patient having dementia of Alzheimer’s type, comprising administering 60 mcg dexmedetomidine or a pharmaceutically acceptable salt thereof to the oral mucosa of the patient, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered by the patient, and wherein the agitation is moderate to severe agitation, wherein the patient is at least 65 years old, optionally at least 75 years old.

[0474] Embodiment 2. The method of embodiment 1, wherein the agitation is not due to pain, infection, concomitant medication, environmental conditions, or a psychiatric condition other than dementia

[0475] Embodiment 3. The method of embodiment 1, wherein the patient does not have delirium.

[0476] Embodiment 4. The method of embodiment 1, wherein the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof sublingually.

[0477] Embodiment 5. The method of embodiment 1, wherein the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof buccally.

[0478] Embodiment 6. The method of Embodiment 1, wherein the patient is determined to have a total score ^14 on the Positive and Negative Syndrome Scale (PANSS) - Excited Component (PEC) scale prior to administration.

[0479] Embodiment 7. The method of Embodiment 6, wherein the PEC score decreases by about 4 to about 6 points within 2 hours post-administration.

[0480] Embodiment 8. The method of Embodiment 1, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film, spray or wafer.

[0481] Embodiment 9. The method of Embodiment 8, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film.

[0482] Embodiment 10. The method of Embodiment 1, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered on as-needed basis.

[0483] Embodiment 11. The method of Embodiment 1, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once or multiple times a day.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0484] Embodiment 12. The method of Embodiment 1, wherein the patient is previously treated with any antipsychotic medication.

[0485] Embodiment 13. The method of Embodiment 1, wherein the patient is not previously treated with any antipsychotic medication.

[0486] Embodiment 14. The method of Embodiment 7, wherein the improvement in score is observed as early as within 30 minutes of administration.

[0487] Embodiment 15. The method of any of Embodiments 1 to 14, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is dexmedetomidine hydrochloride.

[0488] Embodiment 16. A method of treating agitation or signs of agitation in elderly patients having dementia, comprising administering dexmedetomidine or a pharmaceutically acceptable salt thereof to the patient in an agitated state at a dose sufficient to provide a Cmax in a range of about 80% to about 125% of about 50 ng / L to about 500 ng / L, wherein the patient is 65 years old or older.

[0489] Embodiment 17. A method of treating an acute agitation episode in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide AUC0-inf in a range about 80% to about 125% of about 200 hr*ng / L to about 2200 hr*ng / L, wherein the Cmax is in a range of about 80% to about 125% of about 50 ng / L to about 300 ng / L and the patient is 65 years old or older.

[0490] Embodiment 18. A method of treating an acute agitation episode in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide AUC0-8in a range about 80% to about 125% of about 200 hr*ng / L to about 1500 hr*ng / L; wherein the Cmaxis in a range of about 80% to about 125% of about 50 ng / L to about 300 ng / L; and the patient is 65 years old or older.

[0491] Embodiment 19. The method of any of embodiments 16 to 18, wherein the dose of dexmedetomidine or a pharmaceutically acceptable salt thereof is about 30 μg to about 90 μg (for example, about 30 μg to about 60 μg; 60 μg to about 90 μg, or 30 μg to about 45 μg).

[0492] Embodiment 20. The method of embodiment 19, wherein the dose of dexmedetomidine or a pharmaceutically acceptable salt thereof is about 30 μg, about 40 μg, about 45 μg, about 50 μg, about 60 μg, about 75 μg, about 80 μg or about 90 μg.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0493] Embodiment 21. The method of any of embodiments 16 to 18, wherein the route of administration is oromucosal, and the oromucosal includes sublingual, buccal or gingival.

[0494] Embodiment 22. The method of any of embodiments 16 to 21, comprises oromucosally administering about 30 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof one to six times a day at a dosing interval of at least 2 hours.

[0495] Embodiment 23. The method of any of embodiments 16 to 21, comprises oromucosally administering about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof one to six times a day at a dosing interval of at least 2 hours.

[0496] Embodiment 24. The method of any of embodiments 16 to 21, comprises oromucosally administering about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof one to six times a day at a dosing interval of at least 2 hours.

[0497] Embodiment 25. The method of any of embodiments 16 to 21, comprises oromucosally administering about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof one to four times a day at a dosing interval of at least 2 hours.

[0498] Embodiment 26. The method of any of embodiments 16 to 21, comprises oromucosally administering a single dose of about 30 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof followed by 60 μg dose of dexmedetomidine or a pharmaceutically acceptable salt thereof after 2 hours.

[0499] Embodiment 27. The method of any of embodiments 16 to 21, comprises oromucosally administering a single dose of about 30 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof followed by 60 μg dose of dexmedetomidine or a pharmaceutically acceptable salt thereof after 6 hours.

[0500] Embodiment 28. The method of embodiment 16 to 18, wherein the elderly patient is about 75 to about 80 years old.

[0501] Embodiment 29. The method of embodiment 16 to 18, wherein the elderly patient is about 80 years old or older.

[0502] Embodiment 30. A method of treating an acute agitation episode in an elderly dementia patient, comprising administering dexmedetomidine, or a pharmaceutically acceptable salt thereof, to the agitated patient at a dose sufficient to provide AUC0-inf in a range of about 80% to about 125% of about 200 hr*ng / L to about 2200 hr*ng / L; wherein the Cmax is in a range of about 80% to about 125% of about 50 ng / L to about 300 ng / L; and the route of administration is selected from oromucosal, intravenous, intramuscular, subcutaneous, and transdermal.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0503] Embodiment 31. The method of embodiment 30, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 30 μg to about 130μg.

[0504] Embodiment 32. The method of embodiment 30 or 31, wherein AUC0-8is 200 hr*ng / L to about 1500 hr*ng / L (for example, about 200 hr*ng / L to about 1250 hr*ng / L, about 200 hr*ng / L to about 1000 hr*ng / L, about 200 hr*ng / L to about 750 hr*ng / L, about 200 hr*ng / L to about 500 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, about 500 hr*ng / L to about 1250 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 500 hr*ng / L to about 750 hr*ng / L, about 750 hr*ng / L to about 1500 hr*ng / L, about 750 hr*ng / L to about 1250 hr*ng / L, about 750 hr*ng / L to about 1000 hr*ng / L, about 1000 hr*ng / L to about 1500 hr*ng / L.).

[0505] Embodiment 33. The method of any of embodiments 30 to 32, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 30 μg, the Cmax is about 50 ng / L to about 150 ng / L and the AUC0-8 range is between about 200 hr*ng / L to about 600 hr*ng / L(for example, about 200 hr*ng / L to about 400 hr*ng / L, about 300 hr*ng / L to about 600 hr*ng / L, about 300 hr*ng / L to about 500 hr*ng / L, about 350 hr*ng / L to about 450 hr*ng / L).

[0506] Embodiment 34. The method of any of embodiments 30 to 32, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 40 μg, the Cmaxis about 50 ng / L to about 250 ng / L and the AUC0-8range is between about 200 hr*ng / L to about 600 hr*ng / L (for example, about 200 hr*ng / L to about 400 hr*ng / L, about 300 hr*ng / L to about 600 hr*ng / L, about 300 hr*ng / L to about 500 hr*ng / L, about 350 hr*ng / L to about 450 hr*ng / L).

[0507] Embodiment 35. The method of embodiment 30 to 32, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 45 μg, the Cmaxis about 75 ng / L to about 175 ng / L and the AUC0-8range is between about 500 hr*ng / L to about 900 hr*ng / L (for example, about 500 hr*ng / L to about 800 hr*ng / L, about 600 hr*ng / L to about 900 hr*ng / L, about 600 hr*ng / L to about 800 hr*ng / L, about 650 hr*ng / L to about 750 hr*ng / L).

[0508] Embodiment 36. The method of embodiment 30 to 32, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 60 μg ,the Cmax is about 100 ng / L to about 250 ng / L and the AUC0-8 range is between about 500 hr*ng / L to about 1500 hr*ng / L(for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to aboutAttorney Docket No.: BXTI-059 / 02WO 332712-2423 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L).

[0509] Embodiment 37. The method of embodiment 30 to 32, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 90 μg, the Cmaxis about 100 ng / L to 400 ng / L and the AUC0-8range is between about 500 hr*ng / L to about 1500 hr*ng / L. (for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L).

[0510] Embodiment 38. The method of embodiment 33, wherein the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof results in about 80% to about 125% of AUC0-inf range of about 200 hr*ng / L to about 1000 hr*ng / L. (for example, about 200 hr*ng / L to about 900 hr*ng / L, about 300 hr*ng / L to about 800 hr*ng / L, about 300 hr*ng / L to about 750 hr*ng / L, about 350 hr*ng / L to about 750 hr*ng / L).

[0511] Embodiment 39. The method of embodiment 34, wherein the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof results in about 80% to about 125% of AUC0-inf range of about 300 hr*ng / L to about 2200 hr*ng / L, (for example, about 400 hr*ng / L to about 2000 hr*ng / L, about 400 hr*ng / L to about 1800 hr*ng / L, about 500 hr*ng / L to about 1500 hr*ng / L, for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L).

[0512] Embodiment 40. The method of embodiment 35, wherein the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof results in about 80% to about 125% of AUC0-infrange of about 500 hr*ng / L to about 1500 hr*ng / L. (for example, about 500 hr*ng / L to about 1400 hr*ng / L, about 500 hr*ng / L to about 1000 hr*ng / L, about 600 hr*ng / L to about 1400 hr*ng / L, about 600 hr*ng / L to about 1200 hr*ng / L, about 600 hr*ng / L to about 1000 hr*ng / L, about 800 hr*ng / L to about 1400 hr*ng / L, or about 800 hr*ng / L to about 1000 hr*ng / L)

[0513] Embodiment 41. The method of embodiment 36, wherein the administration of dexmedetomidine or a pharmaceutically acceptable salt thereof results in about 80% to about 125% of AUC0-inf range of about 80% to about 125% of about 500 hr*ng / L to about 2000 hr*ng / L.(for example, about 600 hr*ng / L to about 1900 hr*ng / L, about 700 hr*ng / L to aboutAttorney Docket No.: BXTI-059 / 02WO 332712-2423 1800 hr*ng / L, about 700 hr*ng / L to about 1700 hr*ng / L, about 700 hr*ng / L to about 1600 hr*ng / L, about 700 hr*ng / L to about 1500 hr*ng / L, about 800 hr*ng / L to about 1500 hr*ng / L, about 900 hr*ng / L to about 1500, about 1000 hr*ng / L to about 1500 hr*ng / L, about 1100 hr*ng / L to about 1500 hr*ng / L, about 1200 hr*ng / L to about 1500 hr*ng / L, about 1300 hr*ng / L to about 1500 hr*ng / L, or about 1400 hr*ng / L to about 1500 hr*ng / L).

[0514] Embodiment 42. The method of embodiment 33, wherein the Cmaxis about 80% to about 125% of about 50 ng / L to about 150 ng / L, about 50 ng / L to about 125 ng / L, about 50 ng / L to about 100 ng / L, about 50 ng / L to about 75 ng / L, about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L.

[0515] Embodiment 43. The method of embodiment 34, wherein the Cmaxis about 80% to about 125% of about 50 ng / L to about 250 ng / L, for example, about 50 ng / L to about 225 ng / L, about 50 ng / L to about 200 ng / L, about 100 ng / L to about 180 ng / L, about 100 ng / L to about 150 ng / L, about 150 ng / L to about 200 ng / L.

[0516] Embodiment 44. The method of embodiment 35, wherein the Cmax is about 80% to about 125% of about 75 ng / L to about 150 ng / L, about 75 ng / L to about 125 ng / L, about 75 ng / L to about 100 ng / L, about 100 ng / L to about 150 ng / L.

[0517] Embodiment 45. The method of embodiment 36, wherein the Cmax is about 80% to about 125% of about 100 ng / L to about 250 ng / L, about 100 ng / L to about 225 ng / L, about 100 ng / L to about 200 ng / L, about 150 ng / L to about 250 ng / L, about 150 ng / L to about 200 ng / L.

[0518] Embodiment 46. The method of embodiment 37, wherein the Cmaxis about 80% to about 125% of about 100 ng / L to about 400 ng / L, about 100 ng / L to about 350 ng / L, about 100 ng / L to about 300 ng / L, about 200 ng / L to about 400 ng / L, about 200 ng / L to about 350 ng / L

[0519] Embodiment 47. The method of embodiment 30, wherein the elderly patient has both dementia and Alzheimer’s disease.

[0520] Embodiment 48. The method of any of embodiments 1 to 47, wherein the patient is not significantly sedated within 60 minutes after dexmedetomidine pharmaceutically acceptable salt thereof administration.

[0521] Embodiment 49. The method of any of embodiments 1 to 47, wherein the Cmax values and ranges are at least 30% higher as compared to that obtained in schizophrenia and bipolar disorder patients.

[0522] Embodiment 50. The method of any of embodiments 1 to 47, wherein the Cmax value is about 35% higher as compared to that obtained in schizophrenia and bipolar disorder patients.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0523] Embodiment 51. The method of any of embodiments 1 to 47, wherein the AUC values and ranges are at least 50% higher as compared to that obtained in schizophrenia and bipolar disorder patients.

[0524] Embodiment 52. The method of any of embodiments 1 to 47, wherein the AUC values and ranges are about 55% higher as compared to that obtained in schizophrenia and bipolar disorder patients.

[0525] Embodiment 53. The method of any of embodiments 1 to 47, wherein the Cmax, AUC0-^and AUC0-8ranges and values are about 40% and 60% higher compared to that obtained in schizophrenia and bipolar disorder patients.

[0526] Embodiment 54. The method of any of embodiments 1 to 53, wherein the reduction of agitation in the elderly dementia patients is assessed using PEC, PAS, ACES, Mod-CMAI, and / or CGI-I.

[0527] Embodiment 55. The method of any of embodiments 1 to 54, wherein the agitation or signs of agitation are significantly reduced within 60 minutes of administering dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0528] Embodiment 56. The method of embodiment 55, wherein reduction in agitation is maintained for about 2 hours, about 3 hours, about 4 hours, about 5 hours, about 6 hours, about 7 hours, about 8 hours, about 9 hours, about 10 hours, about 11 hours, about 12 hours, about 13 hours, about 14 hours, about 15 hours, about 16 hours, about 17 hours, about 18 hours, about 19 hours, about 20 hours, about 21 hours, about 22 hours, about 23 hours, or about 24 hours.

[0529] Embodiment 57. The method of any of embodiments 1 to 53, wherein the patient achieves a mean change in PAS score of greater than -2 relative to baseline within 2 hours of dexmedetomidine administration.

[0530] Embodiment 58. The method of any of embodiments 1 to 57, wherein the patient achieves a mean change in PEC score of greater than -2 relative to baseline within 2 hours of dexmedetomidine administration.

[0531] Embodiment 59. The method of embodiment 58, wherein the decrease in PEC score is maintained for at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, hours following administration of dexmedetomidine.

[0532] Embodiment 60. The method of any of embodiments 1 to 56, wherein the patient achieves a mean change in mod-CMAI score of greater than -7 relative to baseline after 2 hours of dexmedetomidine administration.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0533] Embodiment 61. The method of embodiment 60, wherein decrease in mod-CMAI score is maintained for at least 2 (including for e.g., 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12) hours following administration of dexmedetomidine.

[0534] Embodiment 62. The method of any of embodiments 1 to 56, wherein the patient achieves a CGI-I score improvement to about 1 (very much improved) or about 2 (much improved).

[0535] Embodiment 63. The method of embodiment 62, wherein the score improvement is sustained for a period of about 2 hours to about 6 hours.

[0536] Embodiment 64. The method of embodiment 62, wherein the score improvement is sustained for a period of about 12 hours.

[0537] Embodiment 65. The method of any of embodiments 1 to 56, wherein the agitation is reduced to a 2 (moderate agitation), 3 (mild agitation) or 4 (normal behavior) 2 hours after administering the composition, as measured by the Agitation-Calmness Evaluation Scale (ACES).

[0538] Embodiment 66. The method of embodiment 65, wherein the agitation is reduced to a 3 (mild agitation).

[0539] Embodiment 68. The method of embodiment 31, wherein the patient has not received treatment for hypertension within at least 10 hours prior to dexmedetomidine administration.

[0540] Embodiment 69. The method of any of embodiments 1 to 68, wherein agitation is acute agitation.

[0541] Embodiment 70. The method of any of embodiments 1 to 68, wherein agitation is chronic agitation.

[0542] Embodiment 71. A method of administering doses higher than about 90 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof to treat agitation in elderly dementia patients who have not received a hypertension treatment for at least 10 hours, at least 24 hours, at least 48 hours, or at least a week, prior to administering dexmedetomidine.

[0543] Embodiment 72. The method of any of embodiments 1 to 71, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually or buccally.

[0544] Embodiment 73. The method of embodiment 72, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a tablet, film, spray, gel or drops.

[0545] Embodiment 74. The method of embodiment 73, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a film.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0546] Embodiment 75. The method of any of embodiments 1 to 74, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally.

[0547] Embodiment 76. The method of embodiment 75, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a tablet, film, spray, gel or drops.

[0548] Embodiment 77. The method of embodiment 76, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a film.

[0549] Embodiment 78. The method of any of preceding embodiments, wherein the patient is treated without also inducing clinically significant cardiovascular effects.

[0550] Embodiment 79. The method of any of preceding embodiments, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is dexmedetomidine hydrochloride.

[0551] Embodiment 80. A method of treating agitation or signs of agitation in a human subject with delirium hospitalized in ICU, without also inducing significant sedation, comprising oromucosally administering about 20 μg of dexmedetomidine or a pharmaceutically acceptable salt one to four times within 6 hours of first dose at a dosing interval of at least 30 minutes thereof.

[0552] Embodiment 81. A method of treating agitation or signs of agitation in a human subject with delirium hospitalized in ICU, without also inducing significant sedation, comprising oromucosally administering about 20 μg of dexmedetomidine or a pharmaceutically acceptable salt one to four times within 6 hours of first dose at a dosing interval of at least 30 minutes thereof.

[0553] Embodiment 82. A method of treating agitation or signs of agitation in a human subject with delirium hospitalized in ICU, without also inducing significant sedation, comprising oromucosally administering about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt one to four times within 6 hours of first dose at a dosing interval of at least 30 minutes thereof.

[0554] Embodiment 83. A method of treating agitation or signs of agitation in a human subject with delirium hospitalized in ICU, without also inducing significant sedation, comprising oromucosally administering about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof one to four times within 6 hours of first dose at a dosing interval of at least 30 minutes.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0555] Embodiment 84. A method of treating agitation or signs of agitation in a human subject with delirium hospitalized in ICU, without also inducing significant sedation, comprising oromucosally (e.g., sublingually or buccally) administering about 20 μg to about 300 μg of dexmedetomidine or a pharmaceutically acceptable salt.

[0556] Embodiment 85. The method of embodiment 84, wherein the agitation or signs of agitation and delirium severity are significantly reduced as measured by RASS and DRS-R-98 respectively

[0557] Embodiment 86. The method of embodiment 84, wherein the subject achieves a 2-point or greater drop in RASS at 2 hours.

[0558] Embodiment 87. The method of embodiment 84, wherein dexmedetomidine or a pharmaceutically acceptable salt is administered at a dose of about 20 μg, 60 μg, 80 μg, 90 ^g, 100 μg, 120 μg, 150 μg, 180 μg, 210 μg, 240 μg, 270 μg, or 300 μg.

[0559] Embodiment 88. The method of embodiment 84, wherein dexmedetomidine or a pharmaceutically acceptable salt is administered at a dose of about 270 μg.

[0560] Embodiment 89. The method of embodiment 84, wherein the dose of dexmedetomidine or a pharmaceutically acceptable salt is about 300 μg.

[0561] Embodiment 90. The method of embodiment 84, wherein the subject’s initial RASS is not less than or equal to -3.

[0562] Embodiment 91. The method of embodiment 84, wherein the dexmedetomidine or a pharmaceutically acceptable salt is administered as a single unit dose or multiple unit dose.

[0563] Embodiment 92. The method of embodiment 84, wherein dexmedetomidine or a pharmaceutically acceptable salt is administered one to ten times a day at an interval of about 1-6 hours of first dose to produce desired effect.

[0564] Embodiment 93. The method of embodiment 84, wherein dexmedetomidine or a pharmaceutically acceptable salt is administered twice a day.

[0565] Embodiment 94. The method of embodiment 84, wherein about 120 μg dose of dexmedetomidine or a pharmaceutically acceptable salt is administered two times a day at an interval of 12 hours.

[0566] Embodiment 95. The method of embodiment 84, wherein about 120 μg dose of dexmedetomidine or a pharmaceutically acceptable salt is administered seven times a day at an interval of about 1 to 6 hours to produce a maximum cumulative dose of 960 μg.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0567] Embodiment 96. The method of embodiment 84, wherein about 180 μg dose of dexmedetomidine or a pharmaceutically acceptable salt is administered followed by additional six doses of 120 μg at an interval of about 1 to 6 hours

[0568] Embodiment 97. The method of embodiment 84, wherein about 240 μg dose of dexmedetomidine or a pharmaceutically acceptable salt is administered followed by an additional six doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of 960 μg.

[0569] Embodiment 98. The method of embodiment 84, wherein about 300 μg dose of dexmedetomidine or a pharmaceutically acceptable salt is administered followed by an additional five doses of 120 μg in a day at an interval of about 1 to about 6 hours to produce the maximum cumulative dose of 900 μg.

[0570] Embodiment 99. The method of any of embodiments 80 to 98, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a tablet, film, spray, gel or drops.

[0571] Embodiment 100. The method of embodiment 99, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually as a film.

[0572] Embodiment 101. The method of any of embodiments 80 to 98, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a tablet, film, spray, gel or drops.

[0573] Embodiment 102. The method of embodiment 101, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally as a film.

[0574] Embodiment 103. The method of any of embodiments 80 to 98, wherein the subject is 18-64 years old.

[0575] Embodiment 104. The method of any of embodiments 80 to 98, wherein the subject is above 64 years old.

[0576] Embodiment 105. A method of reducing a period of opioid withdrawal by administering dexmedetomidine or a pharmaceutically acceptable salt thereof (e.g., dexmedetomidine hydrochloride) twice daily to a human subject of at least 18 years old in need thereof for the period of withdrawal, wherein the period of withdrawal is up to 14 days.

[0577] Embodiment 106. A method of treating or ameliorating opioid withdrawal symptoms, comprising administering a composition comprising dexmedetomidine or a pharmaceutically acceptable salt thereof to a human patient in need thereof, wherein the patient is at least 18 years old and wherein the period of withdrawal is up to 14 days.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0578] Embodiment 107. The method of embodiment 106, wherein the treatment comprises reducing the period of opioid withdrawal.

[0579] Embodiment 108. The method of embodiment 107, wherein the opioid withdrawal symptom is agitation.

[0580] Embodiment 109. The method of embodiment 106, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose range between 30 μg to about 600 μg.

[0581] Embodiment 110. The method of embodiment 109, wherein the composition comprises a dose range of dexmedetomidine or a pharmaceutically acceptable salt thereof between 30 μg to about 300 μg.

[0582] Embodiment 111. The method of embodiment 109 or 110, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a unit dose of about 30 μg, 60 μg, 90 μg, 120 μg, 150 μg, 180 μg, 240 μg, 270 μg or 300 μg twice daily.

[0583] Embodiment 112. The method of embodiment 109 or 110, wherein the period of withdrawal is up to: 14 days, 13 days, 12 days, 11 days, 10 days, 9 days, 8 days, 7 days, 6 days, 5 days, 4 days, or 3 days.

[0584] Embodiment 113. The method of embodiment 109 or 110, wherein the composition is administered twice daily for 7 days.

[0585] Embodiment 114. The method of embodiment 109 or 110, wherein the opioid is selected from the group comprising of fentanyl, morphine, codeine, heroin, oxycodone, hydrocodone, alfentanil carfentanil, tramadol, hydromorphone, buprenorphine, naloxone, naltrexone, remifentanil butorphanol, meperidine, methadone, dextropropoxyphene (propoxyphene) thebaine, sufentanil or pentazocine.

[0586] Embodiment 115. The method of embodiment 109 or 110, wherein the opioid had been administered for amount of time longer than neonate treatment prior to withdrawal.

[0587] Embodiments 116. The method of embodiment 109 or 110, wherein improvement in the subject is assessed using a Clinical Opiate Withdrawal Scale (COWS) and / or the Short Opiate Withdrawal Scale (SOWS) of Gossop (e.g., over a 10-day period) after following the treatment.

[0588] Embodiment 117. The method of embodiment 109 or 110, wherein improvement in opioid withdrawal is measured in terms of retention (in days) and percentage of subjects dropping after discontinuation of opioid.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0589] Embodiment 118. The method of embodiment 109 or 110, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 240 μg twice a day (in an interval of 12 hours).

[0590] Embodiment 119. The method of embodiment 114, wherein the opioid is fentanyl.

[0591] Embodiment 120. The method of embodiment 109 or 110, wherein the patient is 18 years old to 64 years old.

[0592] Embodiment 121. The method of any of embodiments 106 to 120, wherein retention rate of at least about 40% was observed at Day 6 post treatment with 120 μg dose of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0593] Embodiment 122. The method of any of embodiments 106 to 120, wherein retention rate of at least about 50% was observed at Day 6 post treatment with 180 μg dose of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0594] Embodiment 123. The method of any of embodiments 106 to 120, wherein significant reduction in subjective rating of insomnia is obtained on Day 7 as measured on SOWS scale after administration of about 240μg dose of dexmedetomidine or a pharmaceutically acceptable salt thereof twice daily

[0595] Embodiment 124. The method of any of embodiments 106 to 120, wherein significant reduction in ratings of anxiety or irritability is obtained on Day 8 as measured on COWS scale after administration of about 240μg dose of dexmedetomidine or a pharmaceutically acceptable salt thereof twice daily.

[0596] Embodiment 125. The method of embodiment 108, wherein the agitation is reduced to 3 (mild agitation) or 4 (normal behavior) and 5 (mild calmness) after administering dexmedetomidine or a pharmaceutically acceptable salt thereof as measured by the Agitation- Calmness Evaluation Scale (ACES).

[0597] Embodiment 126. The method of any of embodiments 106 to 125, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof provides the mean plasma concentrations in the range of about 40 ng / L to about 500 ng / L on day 6 after 2 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt.

[0598] Embodiment 127. The method of any of embodiments 106 to 125, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof provides the mean plasma concentrations in the range of about 20 ng / L to about 200 ng / L on day 6 after 6 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride).Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0599] Embodiment 128. The method of any of embodiments 106 to 125, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof provides the mean plasma concentrations in the range of about 20 ng / L to about 150 ng / L on day 6 after 12 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride).

[0600] Embodiment 129. The method of any of embodiments 106 to 125, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof provides the mean plasma concentrations in the range of about 50 ng / L to about 500 ng / L on day 12 after 2 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride).

[0601] Embodiment 130. The method of any of embodiments 106 to 125, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof provides the mean plasma concentrations in the range of about 20 ng / L to about 250 ng / L on day 12 after 6 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt (e.g., hydrochloride).

[0602] Embodiment 131. The method of any of embodiments 106 to 125, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof provides the mean plasma concentrations in the range of about 10 ng / L to 150 ng / L on day 12 after 12 hours of administration of dexmedetomidine or a pharmaceutically acceptable salt.

[0603] Embodiment 132. The method of any of embodiments 106 to 125, wherein the mean plasma concentrations are preferably 80% to 125% of these ranges and values.

[0604] Embodiment 133. The method of any of embodiment 106 or 107, wherein when the dose is 30μg, the mean plasma concentrations are in the range of about 20 ng / L to about 50 ng / L (for example about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L and about 45 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6.

[0605] Embodiment 134. The method of any of embodiment 106 or 107, wherein when the dose is 60μg, the mean plasma concentrations are in the range of about 25 ng / L to about 150 ng / L (for example about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0606] Embodiment 135. The method of any of embodiment 106 or 107, wherein when the dose is 90μg, the mean plasma concentrations are in the range of about 30 ng / L to about 150 ng / L (for example about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6.

[0607] Embodiment 136. The method of any of embodiment 106 or 107, wherein when the dose is 120 μg, the mean plasma concentrations are in the range of about 50 ng / L to about 200 ng / L for example, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L and about 195 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6.

[0608] Embodiment 137. The method of any of embodiment 106 or 107, wherein when the dose is 180 μg, the mean plasma concentrations are in the range of about 100 ng / L to about 450 ng / L for example, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 400 ng / L, about 425 ng / L, about 450 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6.

[0609] Embodiment 138. The method of any of embodiment 106 or 107, wherein when the dose is 240 μg, the mean plasma concentrations are in the range of about 100 ng / L to about 400 ng / L for example, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 395 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 6.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0610] Embodiment 139. The method of any of embodiment 106 or 107, wherein when the dose is 30μg, the mean plasma concentrations are in the range of about 10 ng / L to about 100 ng / L (for example about 15 ng / L, about 20 ng / L, about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 80 ng / L, about 90 ng / L, about 95 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0611] Embodiment 140. The method of any of embodiment 106 or 107, wherein when the dose is 60μg, the mean plasma concentrations are in the range of about 10 ng / L to about 150 ng / L (for example 15 ng / L, about 20 ng / L, about 25 ng / L, about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0612] Embodiment 141. The method of any of embodiment 106 or 107, wherein when the dose is 90μg, the mean plasma concentrations are in the range of about 25 ng / L to about 150 ng / L (for example about 30 ng / L, about 35 ng / L, about 40 ng / L, about 45 ng / L, about 50 ng / L, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12

[0613] Embodiment 142. The method of any of embodiment 106 or 107, wherein when the dose is 120 μg, the mean plasma concentrations are in the range of about 50 ng / L to about 200 ng / L for example, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 90 ng / L, about 100 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L and about 195 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0614] Embodiment 143. The method of any of embodiment 106 or 107, wherein when the dose is 180 μg, the mean plasma concentrations are in the range of about 100 ng / L to about 400 ng / L for example, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185Attorney Docket No.: BXTI-059 / 02WO 332712-2423 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 400 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12.

[0615] Embodiment 144. The method of any of embodiment 106 or 107, wherein when the dose is 240 μg, the mean plasma concentrations are in the range of about 50 ng / L to about 500 ng / L for example, about 55 ng / L, about 60 ng / L, about 70 ng / L, about 75 ng / L, about 80 ng / L, about 90 ng / L, about 95 ng / L, about 105 ng / L, about 110 ng / L, about 115 ng / L, about 120 ng / L, about 125 ng / L, about 130 ng / L, about 135 ng / L, about 140 ng / L, about 145 ng / L, about 150 ng / L, about 160 ng / L, about 165 ng / L, about 170 ng / L, about 175 ng / L, about 180 ng / L, about 185 ng / L, about 190 ng / L, about 195 ng / L, about 200 ng / L, about 225 ng / L, about 250 ng / L, about 275 ng / L, about 300 ng / L, about 325 ng / L, about 350 ng / L, about 375 ng / L, about 395 ng / L, about 400 ng / L, about 425 ng / L, about 450 ng / L, about 460 ng / L, about 465 ng / L, about 475 ng / L, about 480 ng / L, about 485 ng / L, about 490 ng / L and about 495 ng / L) post administration of dexmedetomidine or pharmaceutically acceptable salt thereof on day 12

[0616] Embodiment 145. The method of any of embodiments 133 to 144, wherein the mean plasma concentrations are 80% to 125% of these ranges and values

[0617] Embodiment 146. The method of any one of the embodiments 105 to 145, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered oromucosally (e.g., sublingually or buccally) in the form of a tablet, film, spray, gel or drops.

[0618] Embodiment 147. The method of embodiment 146, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a tablet, film, spray, gel or drops.

[0619] Embodiment 148. The method of embodiment 147, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a film.

[0620] Embodiment 149. The method of embodiment 148, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a film, patch or tablet.

[0621] Embodiment 150. The method of embodiment 146, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a film.

[0622] Embodiment 151. The method of any of the preceding embodiments, wherein the patient is treated without also inducing clinically significant cardiovascular effects.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0623] Embodiment 152. The method of any one of the embodiments 105 to 145, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered orally, intranasally or parenterally.

[0624] Embodiment 153. The method of any of relevant preceding embodiments, where dexmedetomidine or a pharmaceutically acceptable salt thereof is administered as a film, wherein said film is a self-supporting, dissolvable, film, comprising: (i) dexmedetomidine or a pharmaceutically acceptable salt thereof; (ii) one or more water-soluble polymers; and, optionally, (iii) one or more pharmaceutically acceptable carriers.

[0625] Embodiment 154. The method of embodiment 153, wherein (ii) comprises a low molecular weight, water-soluble polymer and two high molecular weight, water-soluble polymers.

[0626] Embodiment 155. The method of embodiment 154, wherein the low molecular weight, water-soluble polymer has a molecular weight from about 5,000 Daltons to about 49,000 Daltons, and each high molecular weight, water-soluble polymer has a molecular weight of greater than about 60,000 Daltons.

[0627] Embodiment 156. The method of embodiment 154, wherein the low molecular weight, water-soluble polymer has a molecular weight of about 40,000 Daltons, one of the two high molecular weight, water-soluble polymers has a molecular weight of about 140,000 Daltons, and the other high molecular weight, water-soluble polymer has a molecular weight of about 370,000 Daltons.

[0628] Embodiment 157. The method of any one of embodiments 154 to 156, wherein each water-soluble polymer is hydroxypropyl cellulose.

[0629] Embodiment 158. The method of any one of embodiments 154 to 156, wherein the film also comprises polyethylene oxide.

[0630] Embodiment 159. The method of embodiment 158, wherein the polyethylene oxide has a molecular weight of about 600,000 Daltons.

[0631] Embodiment 160. The method of any of relevant preceding embodiments, where dexmedetomidine or a pharmaceutically acceptable salt thereof is administered as a film, wherein said film is a self-supporting, dissolvable, film, comprising: (i) dexmedetomidine or a pharmaceutically acceptable salt thereof; (ii) a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons;Attorney Docket No.: BXTI-059 / 02WO 332712-2423 (iii) a high molecular weight, water-soluble polymer having a molecular weight from about 140,000 Daltons; (iv) a high molecular weight, water-soluble polymer having a molecular weight from about 370,000 Daltons; and (v) a water-soluble polyethylene oxide having a molecular weight of about 600,000 Daltons.

[0632] Embodiment 161. The method of embodiment 160, wherein the film components excluding dexmedetomidine or a pharmaceutically acceptable salt thereof form a single layer film substrate, and dexmedetomidine or a pharmaceutically acceptable salt thereof is present on the surface of the film substrate.

[0633] Embodiment 162 The method of embodiment 161, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is present on the surface of the film substrate within a composition comprising dexmedetomidine or a pharmaceutically acceptable salt thereof, a low molecular weight, water-soluble polymer having a molecular weight of about 40,000 Daltons, and a high molecular weight, water-soluble polymer having a molecular weight of about 140,000 Daltons. Embodiment 147. A method of treatment of alcohol use disorder (AUD) with comorbid posttraumatic stress disorder (PTSD) comprising administering oromucosally to the subject in need thereof a pharmaceutical composition comprising about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0634] Embodiment 163 A method of treatment of alcohol use disorder (AUD) with comorbid posttraumatic stress disorder (PTSD) comprising administering oromucosally to the subject in need thereof a pharmaceutical composition comprising about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0635] Embodiment 164. A method of reducing alcohol consumption comprising administering oromucosally to the subject in need thereof a pharmaceutical composition comprising dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0636] Embodiment 165. The method of embodiment 164, wherein the subject is suffering from alcohol use disorder with comorbid posttraumatic stress disorder (PTSD).

[0637] Embodiment 166. The method of embodiment 162 or 163, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 40 μg.

[0638] Embodiment 167. The method of embodiment 162 or 163, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered at a dose of about 80 μg.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0639] Embodiment 168. The method of embodiments 162 to 167, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually or buccally.

[0640] Embodiment 169. The method of embodiment 168, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a tablet, film, spray, gel or drops.

[0641] Embodiment 170. The method of embodiment 169, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually in the form of a film.

[0642] Embodiment 171. The method of embodiment 168, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally.

[0643] Embodiment 172. The method of embodiment 171, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered buccally in the form of a film, patch or tablet.

[0644] Embodiment 173. The method of any of the relevant preceding embodiments, wherein dexmedetomidine is present as dexmedetomidine hydrochloride.

[0645] Embodiment 174. The method of any of relevant preceding embodiments, wherein the subject is treated without experiencing clinically significant cardiovascular effects.

[0646] Embodiment 175. The method of any of embodiments 162 to 174, wherein the subject is treated without experiencing significant sedation.

[0647] Embodiment 176. The method of any of embodiments 162 to 174, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered from one to six times a day.

[0648] Embodiment 177. The method of any of embodiments 162 to 167, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once every 3 days.

[0649] Embodiment 178. The method of any of embodiments 162 to 164, wherein treatment may further comprise concurrent administration of ethanol infusion.

[0650] Embodiment 179. The method of embodiment 178, wherein ethanol is administered using a clamp methodology targeting a breath alcohol concentration (BrAC) of 100 mg.

[0651] Embodiment 180. The method of embodiment 162 or embodiment 163, wherein the subject diagnosed with PTSD is determined by Clinician-Administered PTSD Scale for DSM- 5 (CAPS-5).

[0652] Embodiment 181. The method of embodiment 162 or embodiment 163, wherein the subject with PTSD has a PCL-5 score >33.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0653] Embodiment 182. The method of embodiments 162 or embodiment 163, wherein the subject diagnosed having alcohol use disorder is determined using Mini-International Neuropsychiatric Interview for DSM-5 (MINI-5).

[0654] Embodiment 183. The method of any of embodiments 162 to 164, wherein the subject is not previously treated with any other medication.

[0655] Embodiment 184. The method of any of embodiments 162 to 164, wherein the subject is suffering from bipolar disorder.

[0656] Embodiment 185. The method of embodiments 162 to 164, wherein the subject is not suffering from bipolar disorder.

[0657] Embodiment 186. The method of embodiment 162 to 164, wherein the subject is below 65 years old, preferably between 21 years old to 50 years old.

[0658] Embodiment 187. The method of embodiment 162 to 164, wherein the subject is above 65 years old.

[0659] Embodiment 188. The method of any of embodiments 162 to 167, wherein the subject has a breath alcohol content of less than 0.02 as determined using alcohol breathalyzer.

[0660] Embodiment 189. The method of any of embodiments 162 to 188, wherein the subject has a score of less than 4 on clinical Institute Withdrawal Assessment for Alcohol Scale (CIWA-Ar).

[0661] Embodiment 190. The method of any of embodiments 162 to 189, wherein changes in stress (PTSD) and alcohol cue reactivity are measured using sSTAI-6, VAS and YCS.

[0662] Embodiment 191. The method of any of embodiments 162 to 189, wherein changes in stress (PTSD) and alcohol cue reactivity when administered in combination with alcohol are measured using Biphasic Alcohol Effects Scale (BAES); Number of Drinks Scale (NDS); Cognitive performance as assessed by the Hopkins Verbal Learning Test (HVLT-R), Go No- Go Task, and Rapid Information Processing Task (RVIP) and Motor impairment as assessed by the Grooved Pegboard Test.

[0663] Embodiment 192. The method of any of embodiments 162 to 191, where dexmedetomidine or a pharmaceutically acceptable salt thereof is administered as a film, wherein said film is a self-supporting, dissolvable, film, comprising: (i) dexmedetomidine or a pharmaceutically acceptable salt thereof; (ii) one or more water-soluble polymers; and, optionally, (iii) one or more pharmaceutically acceptable carriersAttorney Docket No.: BXTI-059 / 02WO 332712-2423

[0664] Embodiment 193. The method of any of embodiments 162 to 192,wherein dexmedetomidine hydrochloride is administered as a film, wherein said film is a self- supporting, dissolvable, film, comprising: (a) a composition comprising: (i) dexmedetomidine hydrochloride; (ii) hydroxypropyl cellulose (40,000MW); and (iii) hydroxypropyl cellulose (140,000MW); and (b) a film substrate comprising: (i) hydroxypropyl cellulose (40,000MW); (ii) hydroxypropyl cellulose (140,000MW); (iii) hydroxypropyl cellulose (370,000MW); and (iv) polyethylene oxide (600,000MW); wherein the composition of part (a) is present on the surface of the film substrate (b).

[0665] Embodiment 194. A method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation,comprising oromucosally administering a single dose containing about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia.

[0666] Embodiment 195. A method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation, comprising oromucosally administering a single dose containing about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with schizophrenia.

[0667] Embodiment 196. A method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation,comprising oromucosally administering a single dose containing about 80 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with bipolar disorder.

[0668] Embodiment 197. A method of treating agitation or signs of agitation in a pediatric subject without also inducing significant sedation,comprising oromucosally administering a single dose containing about 120 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein the agitation is associated with bipolar disorder.

[0669] Embodiment 198. The method of embodiment 194 or 195, wherein the subject is about 13-17 years old.

[0670] Embodiment 199. The method of embodiment 196 or 197, wherein the subject is about 10-17 years old.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0671] Embodiment 200. The method of embodiment 194 to 199, wherein the agitation is acute.

[0672] Embodiment 201. The method of embodiment 194 to 197, wherein the subject is diagnosed with Attenuated Psychosis Syndrome DSM-5298.8 (F28).

[0673] Embodiment 202. The method of embodiment 194 to 197, wherein the subject has a score of ^4 on at least 1 of the 5 items on the PEC at baseline.

[0674] Embodiment 203. The method of embodiment 194 to 197, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered sublingually or buccally as a film.

[0675] Embodiment 204. The method of embodiment 194 to 197, wherein reduction in agitation or signs of agitation is measured by relative change in PEC score after adminsitration of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0676] Embodiment 205. The method of embodiment 194 to 197, wherein the clinical improvement in agitation is measured using PANSS, ACES, and / or CGI-I scales.

[0677] Embodiment 206. A method of treating cocaine toxicity and / or symptoms associated with cocaine toxicity comprising administering oromucosally about 30μg to about 400 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof.

[0678] Embodiment 207. A method of treating acute agitation or signs of agitation in a human subject suffering from dementia, comprising administering about 40 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof to the subject, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof is on “as-needed” basis.

[0679] Embodiment 208. A method of treating acute agitation or signs of agitation in a human subject suffering from dementia, comprising administering about 60 μg of dexmedetomidine or a pharmaceutically acceptable salt thereof, wherein administration of dexmedetomidine or a pharmaceutically acceptable salt thereof is on “as-needed” basis.

[0680] Embodiment 209. The method of embodiment 207 or 208, wherein the subject was not previously treated with any antipsychotic medication.

[0681] Embodiment 210. The method of embodiment 207 or 208, wherein the subject was previously treated with antipsychotic medication.

[0682] Embodiment 211. The method of any of embodiments 207 to 210, dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once daily.

[0683] Embodiment 212. The method of any of embodiments 207 to 211, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered up to a maximum of 28 doses within a period of 12 weeks.Attorney Docket No.: BXTI-059 / 02WO 332712-2423

[0684] Embodiment 213. The method of any of preceding embodiments, wherein the agitation is psychotomor agitation.

[0685] Embodiment 214. The method of any of preceding embodiments, wherein the route of administration is oromucosal (e.g., sublingual, buccal or gingival).

[0686] Embodiment 215. The method of any of preceding embodiments, wherein dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally as tablets, drops, wafers or a film.

[0687] Embodiment 216. The method of embodiment 215, wherein dexmedetomidine or a pharmaceutically acceptable salt is administered oromucosally as a film.

[0688] Embodiment 217. The method of embodiment 216, wherein dexmedetomidine or a pharmaceutically acceptable salt i...

Claims

Attorney Docket No.: BXTI-059 / 02WO 332712-2423 CLAIMS What is claimed is:

1. A method of treating an acute agitation episode in a patient having dementia of Alzheimer’s type, comprising administering 60 mcg dexmedetomidine or a pharmaceutically acceptable salt thereof to the oral mucosa of the patient, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is self-administered by the patient, and wherein the agitation is moderate to severe agitation, wherein the patient is at least 65 years old, optionally at least 75 years old.

2. The method of claim 1, wherein the agitation is not due to pain, infection, concomitant medication, environmental conditions, or a psychiatric condition other than dementia.

3. The method of claim 1, wherein the patient does not have delirium.

4. The method of claim 1, wherein the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof sublingually.

5. The method of claim 1, wherein the patient administers the dexmedetomidine or a pharmaceutically acceptable salt thereof buccally.

6. The method of claim 1, wherein the patient is determined to have a total score ^14 on the Positive and Negative Syndrome Scale (PANSS) - Excited Component (PEC) scale prior to administration.

7. The method of claim 6, wherein the PEC score decreases by about 4 to about 6 points within 2 hours post-administration.

8. The method of claim 1, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film, spray or wafer.

9. The method of claim 8, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is administered in the form of a film.Attorney Docket No.: BXTI-059 / 02WO 332712-2423 10. The method of claim 1, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered on as-needed (or PRN) basis.

11. The method of claim 1, wherein dexmedetomidine or a pharmaceutically acceptable salt thereof is administered once or multiple times a day.

12. The method of claim 1, wherein the patient was previously treated with any antipsychotic medication.

13. The method of claim 1, wherein the patient was not previously treated with any antipsychotic medication.

14. The method of claim 7, wherein the improvement in score is observed as early as within 30 minutes of administration.

15. The method of any of claims 1 to 14, wherein the dexmedetomidine or a pharmaceutically acceptable salt thereof is dexmedetomidine hydrochloride.

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