70 results about "Oxcarbazepine" patented technology

Bilayer tablet comprising an immediate release first layer comprising an effective amount of oxcarbazepine and at least one pharmaceutically acceptable excipients and a controlled release second layer comprising an effective amount of oxcarbazepine and pharmaceutically acceptable excipients wherein the total amount of oxcarbazepine impurities is less than or equal to about 2% by weight. A process for preparation of controlled release bilayer tablets is capable of delivering oxcarbazepine from one layer immediately followed by a controlled delivery of oxcarbazepine from a matrix forming layer, and a process for preparation of oxcarbazepine bilayer tablets. Bilayer tablets of oxcarbazepine, which maintain a therapeutically effective blood concentration of oxcarbazepine with once a day administration.

Controlled-release preparations of oxcarbazepine and derivatives thereof for once-a-day administration are disclosed. The inventive compositions comprise solubility-and/or release enhancing agents to provide tailored drug release profiles, preferably sigmoidal release profiles. Methods of treatment comprising the inventive compositions are also disclosed.

A process for preparing Oxcarbazepine III

comprising:

a) reacting oximinostilbene IV

with chlorosulfonyl isocyanate in an inert organic solvent and isolating compound V

b) hydrolyzing compound V to form crude Oxcarbazepine III

c) purifying oxcarbazepine.

The present invention relates to pharmaceutical formulation of antiepileptic drug preferably oxcarbazepine. The formulation comprises multiple tablets or pellets of immediate release or controlled release nature, which are filled, inside the capsule to provides drug effect for 24 hours and is suitable for once a day administration. The patent also provides process of preparation of the dosage form.

This invention relates to a once a day sustained release dosage form suitable for oral administration of oxcarbazepine. The once a day sustained release dosage form of oxcarbazepine includes oxcarbazepine and hydroxypropyl methylcellulose (HPMC) having a viscosity of 11,000 to 25,000 cps.

The invention discloses a supplemental detection method of seven chemical medicines including carbamazepine, chlorpromazine hydrochloride, olanzapine, doxepin hydrochloride, quetiapine fumarate, oxcarbazepine and sulpiride which are illegally added into health-care food or Chinese patent medicine for improving sleep. After a sample is subjected to ultrasonic extraction with methyl alcohol, chromatogram column separation is conducted, a mobile phase is eluted, and DAN detector is used for detection. By means of a built detection method, methodological verification is conducted, and parameters of results are shown in the description. It is verified that the method is quick, high in specificity and suitable for detection of chemical medicine added to the health-care food or Chinese patent medicine for improving sleep.

The invention discloses a method of removing PPCPs (Pharmaceutical and Personal Care Products) in drinking water by combination of ozone and activated charcoal. The method comprises the following steps: enabling ozone and aqueous liquor to be fully contacted by adopting a mode that gas and water are continuously and reversely contacted by means of ozone; then, carrying out further reaction through a retaining column, and then, enabling the obtained product to enter into a bio-activated charcoal column to be treated. The method disclosed by the invention can effectively remove PPCPs in drinking water, wherein the removal rate of carbamazepine, oxcarbazepine, progesterone and progesterone reaches over 99.9% while caffeine, antipyrine, aminopyrine and sulfamethoxazole are not detected in the effluent. Compared with existing drinking water treatment technologies, the method has higher chemical safety guarantee and meanwhile has a better removal effect on conventional pollutants in domestic drinking water. The effluent can stably reach the national sanitary standard (GB5749-2006) of domestic drinking water, so that the method has huge practical value and utilization potential.

The invention relates to method of synthesizing OCBZ and its intermediates. It takes 5H - dibenzo [b, f] aza - 5- formyl chloride as raw materials, through the addition of halogenated, aminolysis, and hydrolysis reaction to obtain OCBZ, synthetic steps short, high yield and low cost.

The invention discloses a chemical synthesis method of oxcarbazepine, which comprises the steps as follows: adding 5-cyan-11-nitro-5H Dibenzoyl nitrogen heterocyclic shown in formula (III), Raney's nickel catalyst and organic solvent to a reactor, charging hydrogen till the pressure of the hydrogen reaches 2-20atm, performing the reduction reaction completely at 40-120 DEC C, filtering to obtain the filtrate, adding 20wt%-36.5wt% of hydrochloric acid for hydrolyzing completely, concentrating the reactant, and cooling for crystallization to obtain oxcarbazepine shown in formula (I). The reaction equation is described as follows. The synthetic route has the advantages of advanced technological line, simple and safe operation, higher product yield and purity and wide industrialized prospect.

A method for determining blood-medicine concentration of antiepileptic medicine includes pre-treating sample to be determined and separating pretreated sample by acidic mobile phase in chromatographic column then utilizing ultraviolet detector to simultaneously detect quantitative concentration of phenobarbital, lamotrigine, oxcarbazepin and adipomono- oxcarbazepin as antiepileptic medicine.

The present invention relates to methods of treatment of clinical disorders associated with protein polymerization comprising administering, to a subject, an effective amount of carbamazepine, oxcarbazepine or another carbamazepine-like compound. It is based, at least in part, on the discovery that, in cells having a genetic defect in α1-antitrypsin, carbamazepine was able to decrease levels of the mutant protein. Furthermore, carbamazepine reduced the hepatic load of mutant α1-antitrypsin and the toxic effect of that mutant protein accumulation, hepatic fibrosis, in vivo using a mouse model of the disease. As patients having this defect in α1-antitrypsin exhibit toxic accumulations of the protein, treatment according to the invention may be used to ameliorate symptoms and signs of disease.

The invention discloses a biomarker for forecasting severe drug-induced cutaneous adverse reaction of a child patient and an application. The biomarker is capable of forecasting the risk of severe cutaneous adverse reaction of the child patient using beta-lactam antibiotics such as penicillin, cephalosporin, carbamazepine, lamotrigine, oxcarbazepine, phenytoin, allopurinol, nevirapine, abacavir, methazolamide and dapsone.

The invention relates to an oxcarbazepine sustained release tablet and a preparation method thereof. According to the method adopted by the invention, raw materials are specially treated together with an auxiliary material first to prepare oxcarbazepine composition, and the particle size of the oxcarbazepine composition is strictly controlled. KG-802 is added into an extra auxiliary material. According to the oxcarbazepine sustained release tablet prepared with the method provided by the invention, the use of a large amount of a cosolvent namely sodium lauryl sulfate in an original developed preparation is avoided, the toxicity of a preparation finished product to a human body after taking is reduced, and the pollution to the environment in a preparation process is reduced; and compared with a reference product on sale, release curves in release media with different pH values can keep similar, the bioequivalence of an in-vitro test is ensured, and the release curves of the release media with different pH values are more similar to one another in comparison with the preparation on sale. The oxcarbazepine sustained release tablet provided by the invention is prepared by adopting a conventional granulation and tabletting process, the process is simple, and the oxcarbazepine sustained release tablet is suitable for large-scale production.

The invention relates to the field of chemical substance and medicament preparation, specifically to a preparation method of Eslicarbazepine. The preparation method provided by the invention is to perform a reaction of Oxcarbazepine in the presence of a chiral catalyst [MX2((S)-xyl-SDP)((R,R)-DPEN)] to obtain Eslicarbazepine. [MX2((S)-xyl-SDP)((R,R)-DPEN)] is mainly formed by the coordination combination of a chiral diphosphine ligand (a) compound, a chiral nitrogen ligand (b) compound and a metal salt catalyst (MX2(p-cymene)), wherein R1, R2, R3, R4 and R5 are C1-C6 alkyl group or C6-C10 aryl group or hydrogen or -OR6; R6 is C1-C6 alkyl group or C6-C10 aryl group or hydrogen; R7 is C6-C10 aryl group or C1-C6 alkyl group; R8 is C6-C10 aryl group or C1-C6 alkyl group or hydrogen; M is Ru, Rh, Ir, Fe, Co or Ni; and X is a halogen.

The invention discloses preparation of interface self assembled carbonyl reductase and application thereof to S-eslicarbazepine synthesis. The interface self assembled carbonyl reductase is prepared by the following method that carbonyl reductase is added into a buffer solution; then, a methylbenzene solution with dissolved polystyrene is added; oscillation reaction is performed for 2 hours in a shaking bed under the conditions of dark environment, 80r/min and 30 DEG C; centrifugation is performed; a reaction system with the upper layer being an organic phase, the interface self assembled carbonyl reductase distributed in the oil water interface, and the lower layer being a water phase is obtained; the interface self assembled carbonyl reductase is obtained; the interface self assembled carbonyl reductase has a good catalysis function in the oil and water two-phase interface; the oxcarbazepine can be converted into S-eslicarbazepine; the enantiometric excess value of the S-eslicarbazepine is greater than 98 percent. In the water phase, the coenzyme NADH can smoothly realize the in-situ regeneration; the substrate conversion rate can be favorably improved. The interface self assembled enzyme can realize the multi-time repeated utilization, the advantage is incomparable by free enzymes.

Compositions and methods are provided for administering a pharmaceutical composition to a human patient. Compositions are administered to a human patient orally, once daily, at a therapeutically effective dose. The pharmaceutical compositions comprise a drug selected from the group consisting of brivaracetam, divalproex, lacosamide, levetiracetam, oxcarbazepine, vigabatrin, and pharmaceutically acceptable salts of any of the foregoing, and at least one excipient. At least one of said at least one excipients modifies the release of said drug to provide an extended release form. The pharmaceutical composition have pharmacokinetic properties recited in the claims.

The invention provides a method for detecting oxcarbazepine and 10, 11-dihydro-10-hydroxy carbamazepine in blood. The method comprises the following steps of preparing oxcarbazepine and 10, 11-dihydro-10-hydroxy-carbamazepine standard stock solution, preparing oxcarbazepine and 10, 11-dihydro-10-hydroxy-carbamazepine standard intermediate solution, preparing an internal standard working solution and preparing a standard solution, detecting the standard solution by utilizing a liquid chromatography-mass spectrometer, and fitting to obtain a standard curve equation corresponding to the oxcarbazepine and 10, 11-dihydro-10-hydroxy carbamazepine: y1=a*x1+b and y2=c*x2+d; treating the to-be-detected blood, detecting the to-be-detected blood by utilizing a liquid chromatography-mass spectrometer,and calculating the concentrations of oxcarbazepine and 10, 11-dihydro-10-hydroxy carbamazepine in the to-be-detected blood. The method disclosed by the invention is short in analysis time, small ininterference, quantitative and proper in internal standard, strong in specificity, and high in sensitivity.

The invention aims at providing an oxcarbazepine controlled-release tablet which is capable of releasing medicines at a constant speed, and higher in medicine release stability and medicine use safety. The oxcarbazepine controlled-release tablet is characterized by consisting of curative dose of oxcarbazepine and physiologically acceptable pharmaceutical adjuvant; the medicine can be released at the constant speed in different release media. The controlled-release tablet disclosed by the invention has the characteristics of being convenient to dose, lasting in action, stable in curative effect, small in toxic and side effect, and the like.

The invention discloses a liquid chromatographic analysis method for detecting the plasma concentrations of oxcarbazepine and an oxcarbazepine metabolite in blood. The method comprises the steps thata liquid chromatographic analysis instrument and an ultraviolet detector are used for calibrating a standard solution, and fitting is conducted to obtain a standard curve equation representing the concentration of oxcarbazepine and a standard curve equation representing the concentration of the oxcarbazepine metabolite separately, wherein the standard curve equation representing the concentrationof oxcarbazepine is that y1 is equal to the sum of b and the product of a and x1, and the standard curve equation representing the concentration of the oxcarbazepine metabolite is that y2 is equal tothe sum of d and the product of c and x2; a blood sample to be tested is taken, pretreated and detected by using the same liquid chromatographic analysis instrument and ultraviolet detector to obtainy1 and y2 values of the blood to be tested, the y1 and y2 values of the blood sample to be tested are substituted into the two standard curve equations respectively, the relative plasma concentrationsx1 and x2 of oxcarbazepine and the oxcarbazepine metabolite in the blood sample to be tested are obtained through calculation separately, the concentration of an internal standard substance working solution is known, and the plasma concentrations of oxcarbazepine and the oxcarbazepine metabolite in the blood sample to be tested can be obtained through calculation.