643results about How to "Stable blood concentration" patented technology

The invention provides a risperidone slow-release microsphere, a preparation method and an application thereof. The microsphere comprises risperidone or 9-hydroxy risperidone or the salt thereof and anon-end-capped lactide-glycollide copolymer. The risperidone slow-release microsphere provided by the invention has higher medicine-carrying quantity, no in-vivo sudden-release phenomenon, stable blood concentration and no medicine release lag period, reduces the administration frequency of a patient greatly, reduces the administration volume of each time, enhances the conformance of the patientand reduces the generation of adverse reactions.

The preparation method of ginkgo leaf slow-released tablet mainly for curing cerebrovascular disease includes the following steps: 1. preparing gingko leaf extract; and 2. preparing slow-released tablet: using gingko leaf extract 120 portions, hydroxypropyl methyl cellulose 80-100 portions, lactose 50-80 portions and starch 30-80 portions, mixing them uniformly, adding anhydrous ethanol 0.8-1.2 portions to make granulation, then adding magnesium stearate 2-5 portions, uniformly mixing them and tabletting to obtain said invented product.

The invention belongs to the field sustained/controlled-release preparations, in particular to an oral sustained/controlled-release pellet combination containing ginkgo biloba extract and a preparation method. The oral sustained/controlled-release pellet combination is composed of (A) a core containing a pill; (B) an insulating coating layer; (C) a sustained-release coating layer; (D) and an enteric-coated coating layer. The invention is the traditional Chinese medicine multi-component sustained-release pellet combination which is taken once by 24 hours and the multi-unit sustained-release pellet combined preparation with the different drug release systems, the core containing the pill is prepared by adopting the extrusion pill rolling method, a novel sustained-release multi-layer coating technology and a fluidized bed are utilized for coating the sustained-release pellet, the rapid-release part and the sustained-release part of the coated pellet are mixedly filled into a hard capsule or pressed into a pellet tablet. The sustained-release pellet has stable coating process and good reproducibility, thereby being applicable to the industrial mass production; and the drug quality of the preparation is stable through the long-term storage. The in vitro release test shows that the multiple components of the traditional Chinese medicine can achieve the sustained-release role, the sustained-release preparation can significantly increase the transmembrane absorption and the stability of various effective active ingredients by oral drug administration, the curve of plasma drug concentration in vivo is smooth, and the design purpose of 24-hour sustained-release is achieved.

The invention discloses a colchicine bilayer sustained-release tablet which comprises a quick release layer and a sustained-release layer, wherein the quick release layer mainly consists of colchicine, a disintegrant, a filler, a lubricant and an adhesive; the sustained-release tablet mainly consists of colchicine, a sustained-release matrix, a retarding agent, a filler and an adhesive; the weight ratio of the colchicine in the quick release layer to the colchicine in the sustained-release layer is (0.25-0.42) : 1; and the weight ratio of the quick release layer to the sustained-release layer is 1: 2 to 1: 4. The invention also discloses a method for preparing the colchicine bilayer sustained-release tablet. The colchicine bilayer sustained-release tablet releases the drugs through the quick release layer to quickly achieve the effective blood drug concentration, slowly releases the drugs through the sustained-release layer to exert and sustain the stable and uniform effective blood drug concentration, reduces the drug taking times and lightens the toxic or side function.

The invention provides a Sirolimus slow controlled release preparation and a preparation method thereof. By adopting the solubilizing methods including a solid dispersion technology or cyclodextrin inclusion technology or adding one or a plurality of surface active agents after micronizing drugs and the like, the solubility is dramatically improved and further the bioavailability is improved, therefore, a matrix type slow controlled release preparation is made by adding one or a plurality of framework materials and other accessories, or a diaphragm-controlled or osmotic pump type slow controlled release preparation is made by adopting slow controlled release materials for coating. The Sirolimus slow controlled release preparation has better solubility and dissolution rate, high bioavailability as well as slow controlled release effect, thus being capable of maintaining steady blood concentration, bringing down the concentration of peak, reducing the occurrence of adverse reaction and improving the safety of clinical medicines, in addition, the raw materials can be acquired easily, the preparation process is simple and feasible with high yield rate and low cost, and the large-scale industrial production can be realized and the economic benefit is marked.

The invention relates to a pharmaceutical composition which is stored in bedding articles and capable of enabling people to obtain curative effects of tranquilizing and allaying excitement. The Chinese herbal medicine preparation is powder or granule which is prepared by taking one or more of lavender, twinings, jasmine flower and liquorice as materials. According to the invention, a scientific process is adopted for preparing one or more of lavender powder, twinings powder, jasmine flower powder and liquorice powder into powder with a proper grain size or into a similar pharmaceutical granule. The substances with effects of tranquilizing and allaying excitement have effects of slowly releasing for a long time.

The present invention discloses a transcutaneous plaster containing tulobuterol, its preparation method and application. The pressure-sensitive adhesive used by said invention is a hot-melt pressure-sensitive adhesive whose melting point is 50-250 deg.C. the described hot-melt pressure-sensitive adhesive is an adhesive made up by using thermoplastic polymer as main raw material, and hs the hot-melting and pressure-sensitive double characteristics. Said product contains no organic solvent, and its coating speed is quick, and its cost is low.

The invention relates to an allopurinol dual-release preparation and a preparation method thereof, which is characterized in that the dual-release preparation consists of a quick-release part and a slow-release part, wherein the ratio of the base allopurinol contained in the quick-release part to the base allopurinol contained in the slow-release part is 1:1 to 1:24. The invention belongs to the technical field of medicine preparation and aims at providing the allopurinol dual-release preparation with good patient compliance and small side effect and the preparation method thereof, wherein the allopurinol dual-release preparation has the advantages of taking effect quickly and maintaining effective blood concentration stably. The dual-release preparation can not only be used for reducing the side effect on the gastrointestinal tract, but also decreasing the administration times of a patient and adverse effect and promoting the patient compliance.

The invention discloses levetiracetam sustained-release tablets and a preparation method thereof. The levetiracetam sustained-release tablets consist of levetiracetam, a filler, a sustained-release agent, an adhesion agent and a lubricant according to the weight ratio of 100: 30: (3-60): (30-70): 1. The preparation method comprises the following steps of: pelletizing by the wet method, drying the granules, arranging the granules and adding a proper quantity of lubricant, uniformly mixing and pressing to obtain the levetiracetam sustained-release tablets. Compared with the common preparation, the levetiracetam sustained-release tablets prepared by the preparation method have the advantages of small blood concentration fluctuation range, reduction in toxin and side effect and increase in biddability of patients by oral administration once every day. The sustained-release preparation will be clinically applied to additional treatment on partial seizure of epilepsia patients.

The invention relates to a diclofenac sodium hydrogel microballoon with pH sensitivity, a preparation method and application thereof. In the invention, chitosan and sodium alginate are used as drug carriers to prepare a diclofenac sodium hydrogel microballoon slow release preparation; the mass ratio of a used diclofenac sodium drug to the chitosan to the sodium alginate is (1-3):(5-8):(5-8); and the chitosan is N-succinyl-chitosan. The microballoon preparation can durably develop the drug effect to ensure that diclofenac sodium can be regularly and quantitatively released for a long time; after the microballoon preparation is taken, the blood concentration is stable, the fluctuation is small, and the duration time is long; the microballoon preparation has pH sensitivity, thereby irritations and toxic hazards to the stomach mucous membrane, which are caused by directly and orally taking diclofenac sodium tablets, are reduced; and the microballoon preparation has good effects of cooling down and easing pains and is suitable for various rheumatisms, rheumatoid arthritis, lupus erythematosus, ankylosing spondylitis, various pains caused after operations, fevers caused by various reasons, and the like.

The invention relates to a levetiracetam slow release pellet capsule preparation and a preparation method thereof. The levetiracetam slow release pellet capsule preparation comprises the following components in percentage by mass: 50-70 percent of levetiracetam, 15-30 percent of blank pellet, 5-10 percent of hydroxypropylmethyl cellulose or polyvidone, 7-15 percent of ethylcellulose or acrylic resin, 1-8 percent of talc powder and 0.5-2 percent of cataloid. The preparation method comprises the following steps: coating levetiracetam fine powder on the blank pellet by a binding agent to be madeinto a medicine-contained pellet; coating an isolating layer on the medicine-contained pellet; coating a slow release coating film on the medicine-contained pellet coated with the isolating layer to prepare a slow release pellet; and mixing the slow release pellet, the talc powder and the cataloid and filling the mixture into a capsule. The levetiracetam is made into the slow release capsule preparation by a pellet and slow release technology, and the slow release preparation can stabilize blood medicine concentration, reduce the generating frequency and degree of the side effect and fundamentally solve the problems of great influence on a tablet by gastric pyloric sphincter and big differences of gastric emptying individuals.

The invention provides a new air sac type gastric retention controlled-release medicine release system, including (1) an air sac which is formed by wrapping high molecular film-forming materials and hydrophobic materials outside a hollow sac; (2) a medicine containing layer which is composed of medicines and pharmaceutically acceptable excipient; the medicine containing layer covers the outside of the air sac and includes a medicine controlled release layer or a medicine slow release layer. If necessary, a quick release layer, which is composed of medicines and excipient and covers the outside of the controlled release layer or the slow release layer, can also be included. The air sac can also be internally filled with a certain amount of gas generant which includes carbonate and pharmaceutically acceptable organic acid. The average density of the whole formulation can be generally controlled below 0.6/cm<3> and is obviously superior to the present gastro-floating formulation on sale, and the floating time in the stomach is rather longer than a common gastro-floating formulation.

The invention discloses a gliclazide tablet. The gliclazide tablet is directly tabletted by gliclazide solid dispersoid particles and auxiliary materials accepted pharmaceutically; and the gliclazide solid dispersoid particles are prepared according to the following method: citrate and polyvinyl acetate are heated and molten in a hot melt extruder, then gliclazide is added inside to melt, and the molten liquid is extruded and granulated. The preparation method of the invention is simple in preparation production technology; a patient just takes the medicine once every day, the active components slowly release in the body of the patient, and the plasma concentration is steady; and the gliclazide has long effectiveness, so that the times of administration are reduced, the toxic and side effects are lowered, and the treatment cost is greatly reduced.

The invention discloses metformin hydrochloride sustained-release tablets which are characterized in that: every 10000 tablets are prepared from medicine materials and auxiliary materials of, by weight: 5000g of metformin hydrochloride, 1750g of hypromellose, 1750g of sodium carboxymethyl cellulose, 180g of stearic acid, 200g of magnesium stearate, and an appropriate amount of 75% ethanol. The metformin hydrochloride sustained-release tablets can be slowly released in vivo. With the tablets, stability of blood drug level can be maintained, and a half-life period is prolonged. The tablets are safe, can be used for treating type II diabetes, and are advantaged in high efficiency, low toxicity, and convenient administration. The invention also provides a preparation method of the metformin hydrochloride sustained-release tablets.

The invention discloses venlafaxine hydrochloride controlled release tablets and a preparation method thereof. The venlafaxine hydrochloride controlled release tablets are elementary osmotic pump (EOP) controlled release tablets which comprise single-layer tablet cores, insoluble semi-permeable membranes and medicament release holes. In the invention, the high-molecular-weight ethylene oxide, microcrystalline cellulose and sodium chloride three auxiliary materials mixed in a proper ratio form a balance system for medicament dissolution and osmotic pressure generation in a pump chamber, and tablet weight is adjusted by using detrix as a filler, so that a high-medicament-capacity osmotic pump preparation can be obtained and the stable and lasting release can be kept. The preparation effectively overcome the shortcomings that the conventional sustained-release preparation is limited in the stability and controllability of the medicament release and can generate stable and constant-speed release, and the medicament release is protected from the influences of stomach and intestine environments, so that individual difference is reduced and the medicament controlled release design aim of giving play to curing effects and reducing side effects is further fulfilled.

The invention provides a controlled release dosing medicine core composition and an osmotic pump preparation comprising the medicine core composition. The medicine core composition comprises, by weight, 100 parts of an amphiphilic polymer carrier Soluplus, 5-200 parts of medicines, 0-50 parts of a surface active agent, 0-200 parts of a framework material having the controlled release effect, 100-200 parts of an osmotic pressure accelerant having the controlled release effect and 0-20 parts of other auxiliary materials acceptable in pharmacy; the low-solubility medicines are medicines with the in-water solubility smaller than or equal to 1 mg/mL and comprise indissolvable or insoluble medicines with the solubility smaller than or equal to 0.1 mg/mL in water and medicines with the solubility larger than 0.1 mg/mL and very slightly soluble medicines smaller than or equal to 1 mg/mL; the surface active agent is an anion surface active agent; and the other auxiliary materials acceptable in pharmacy comprises one or more kinds of a bonding agent, a coloring agent and a lubricating agent.

The invention discloses a dimethylbiguanide slow release capsule which includes capsule outer cover and slow release particles, wherein the slow release particles comprises dimethylbiguanide and hollow ball cores, retarding agent, slow release film forming material, bulking agent, plasticizing agent, adhesives and hole-forming agent.

The invention relates to a tablet of isosorbide mononitrate, in particular to a double-layer osmotic pump controlled release tablet of isosorbide mononitrate, which belongs to the field of medicine preparation. A single-chamber double-layer osmotic pump tablet of the isosorbide mononitrate is characterized in that a semi-transparent coating film cover a double-layer core body consisting of a medicine-containing layer and a boosting layer; and the coating film is provided with a medicine releasing pore on the surface of the medicine-containing layer. The gastrointestinal tract water enters a double-layer tablet chip through the semi-transparent film; the medicines forms a mixed suspension liquid or solution when contacting water in the medicine-containing layer; a penetration enhancer enables the solution of the medicine-containing layer to be hypertonic so that an osmotic pressure difference exists between the inner side and the outer side of the film, which is beneficial to pumping the medicines out; and the pressure is generated in the boosting layer through water absorption, dissolution and expansion of a penetrating agent so as to further boost a medicine liquid to eject the pore.

The invention discloses a drug double layer core osmotic pump tablet and the preparation method. The drug or the solid dispersion of the drug is mixed uniformly with penetrating agent, thickener and filler, added with adhesive to produce soft material and granulation, baked, and added with lubricant, and then drug layer core tablet material is produced. The penetrating agent, expansive agent and the filler are mixed uniformly, are added with adhesive to produce soft material and particles, are baked and are added with lubricant, and then promoting layer core tablet material is produced. The drug layer core tablet material and the promoting layer core tablet material are punched by a preforming machine with a needle punch to produce double layer core tablet of drug layer with concave holes. Coating liquid containing semi-permeable polymer changes the double layer core tablet of drug layer with concave holes into coated tablet in the coating pot, which is baked to produce double layer core osmotic pump tablet. The double layer core osmotic pump tablet prepared by the invention is similar to zero level release drugs. The invention disuses the slotting process after coating in preparing double layer core osmotic pump tablets without resorting to expensive laser drilling machine, simplifies the preparation process, reduces the cost and fits for industrial production.

The invention relates to a levetiracetam slow release medicinal composite and a preparation method thereof. The tablet core of the medicinal composite is mainly composed by 55-65% of levetiracetam in weight percentage and 35-45% of non hydrophilia auxiliary material with the slow release function in weight percentage, the non hydrophilia auxiliary material with the slow release function is mixed by one, two or three of ethyl cellulose, methyl cellulose or behenic acid glyceride, and the slow release medicinal composite does not need a functional controlled release coating to adjust the drug release. The levetiracetam medicinal composite has stable drug release performance, good biocompatibility and dissolution performance; and the preparation technology is simple, is easy to reproduce, and is applicable to industrialization production.

The invention discloses a ginsenoside Rg3 poly(lactic-co-glycolic acid) (PLGA) nano microsphere and a preparation method thereof. The preparation method of the ginsenoside Rg3 poly(lactic-co-glycolic acid) nano microsphere comprises the following steps: S1, dissolving ginsenoside Rg3 in dimethyl sulfoxide to obtain a first liquid with a first predetermined concentration, and dissolving poly(lactic-co-glycolic acid) copolymer into dichloromethane to obtain a second liquid with a second predetermined concentration; S2, adding the first liquid in a predetermined proportion into the second liquid to perform ultrasonic treatment to form a turbid liquid; S3, adding the turbid liquid into an aqueous liquid containing polyvinyl alcohol to perform ultrasonic emulsion to obtain emulsion; and S4, drying the emulsion, centrifugally separating and washing, and freeze-drying the emulsion after curing the microspheres of the microsphere of the emulsion to obtain the ginsenoside Rg3 poly(lactic-co-glycolic acid) nano microsphere. According to the preparation method of the ginsenoside Rg3 poly(lactic-co-glycolic acid) nano microsphere of the embodiment of the invention, the prepared ginsenoside PLGA microsphere is good in pesticide effect.

The invention relates to a gastrodin gel administrating by nasal cavity, which is composed of main medicine gastrodin and proper watercraft gel matrix and other additive medicine. The inventive gel can be adhered on the mucous membrane surface and extend the resorting period in the nasal cavity after administration. The released medicine can not only be absorbed into the blood circulation from mucous membrane, but also into the brain from the olfactory system, bypassing the blood-brain barrier to better do a treatment as gastrodin. The invention provides a new gastrodin without mucous membrane cilia toxicity has a high bioavailability, a strong patent compliance, a good stability and a simple production process and can be used for the treatments such as headache, blackout, neurasthenia and etc.

The invention provides a medical composite for treating hypertension and a preparation thereof. The medical composite comprises antihypertensive drug, HMGCoA reductase inhibitor and insulin sensitizer. The medical composite of the invention not only can effectively reduce blood pressure, but also has good effect on the treatment and prevention of hypertension complications. The long term survival of patients can be improved obviously.

The invention discloses methanesulfonic acid doxazosin controlling releasing tablets and a process for preparation, which contains a single-layer core, insoluble semi-permeable membrane, single drug-releasing eyelet on each side of the tablet, and depends on the osmotic pressure difference between inside and outside of the semi-permeable membrane medium. The invention realizes the control of linear releasing of methanesulfonic acid doxazosin by single-layer core structure, and can remain effective and steady blood and drug concentration. The curative effect is improved, the generation rate of side effect is reduced, and the productive technology is greatly simplified.

The present invention discloses one kind of control releasing venlafaxine hydrochloride tablet and its preparation process. The control releasing venlafaxine hydrochloride tablet consists of medicine core of venlafaxine hydrochloride and semi-permeable coating with pores. The medicine core consists of venlafaxine hydrochloride 75 weight portions, stuffing 30-250 weight portions, osmotic pressure promoter 1-50 weight portions, adhesive 1-20 weight portions and lubricant 0.1-20 weight portions. The preparation has reasonable composition, excellent control releasing effect, long effective time, less side effect on gastrointestinal tract, less differential personal effect, high safety and good compliance.