186 results about "Levamlodipine" patented technology

The invention discloses a pharmaceutical composition for treating hypertension and other cardiovascular diseases, wherein the active constituents include pharmaceutical salts of levamlodipine besylate and angiotensin II receptor antagonists. The invention can not only overcome the drawback of photodecomposition of the levoamlodipine maleate medicaments, but also can increase the dissolving degree by 21%.

The invention belongs to the technical field of medicament, and provides levamlodipine beaylate tablets and a preparation method thereof. The tablets consist of tablet cores using the levamlodipine beaylate as an active component and film coatings coated on the outer layer, wherein diluent in the tablet cores contains diatomite or aerosil, or a mixture of diatomite and aerosil, and contains other pharmaceutically acceptable supplementary materials; and the outer film coating accounts for 8 to 12 percent of the weight of the tablets, and can play a role in resisting humidity and avoiding light to ensure that the medicinal stability can be greatly improved, and related substances are obviously reduced. Furthermore, the tablets have small specification, so the tablets ensure uniform content, and improve dissolution; and the method is simple and controllable, and ensures that the hygroscopicity of the medicament is obviously reduced.

The invention relates to a levamlodipine besylate tablet, a preparation process thereof and a control method for relevant materials. Each 1000 levamlodipine besylate tablets provided by the invention comprise the following compositions: 2.5g of levamlodipine besylate (measured in besylate), 30 to 50g of lactose (as a filler), 20 to 40g of beta-cyclodextrin (as an inclusion agent), 25 to 45g of microcrystalline cellulose (as a disintegrating agent), 5 to 15g of cross-linked polyvinylpyrrolidone (as a disintegrating agent), 1 to 2g of magnesium stearate (as lubricant), and 50 to 80g of 2.5% HPMC (hydroxypropyl methylcellulose) and 50% ethanol (as an adhesive). The levamlodipine besylate tablet provided by the invention has the advantages of making multi-item improvements on the properties of the levamlodipine besylate, increasing the solubility and apparent dissolution rate of the tablet, improving the stability of the tablet, reducing the excitability of the tablet, significantly reducing the limit of the relevant material, and having better clinical treatment effect, so that the blood pressure lowering of the patient with hypertension is more stable.

The invention discloses levamlodipine beaylate tablets which is prepared by comprising the following raw materials in parts by weight: 1-20 parts of levamlodipine beaylate, 20-150 parts of filling agent, 10-100 parts of disintegrating agent and 1-10 parts of lubricant. The preparation method of the levamlodipine beaylate tablets comprises the following steps of: evenly mixing the raw materials, crushing, screening with a 60-100 mesh sieve, evenly mixing, and preparing the levamlodipine beaylate tablets in a novel powder feeder for a tablet machine by using a direct dry powder tablet compressing method. Compared with the traditional tablet production technology, the levamlodipine beaylate tablets of the invention have the advantages of favorable compressibility, friability and tablet weight variation, uniform content and stable quality.

The invention takes N, N-dimethylformamide as a chiral auxiliary and separates amlodipine with tartaric acid resolution reagent to prepare l-amlodipine. In addition, benzene sulfonic acid and l-amlodipine alkali are directly salified and refined, filtered and dried via a special filter to produce levoamlodipine besylate. The upper part and the lower part of the special filter adopted by the invention are respectively provided with a hemispherical top cap and a hemispherical bottom cap, the middle part is provided with a lauter tank and ring groove filter plates are respectively arranged between the top cap and the lauter tank or the bottom cap and the lauter tank. A feed pipe, inlet and outlet of inert gases, an outlet of cooling fluid and a temperature meter are installed on the top cap of the filter; a discharge pipe and the outlet of cooling fluid are installed on the bottom cap. The filter is provided with an insulating layer and an interlayer, thus can control the temperature, avoid light, be filled with inert gases and protect the feed liquid and filtrate from oxidation, illumination and high temperature damage. The filtration efficiency is high, the effect is good and the structure is simple, the filter operation, disassembly, assembly and cleaning are convenient and the levoamlodipine besylate enjoys high synthesis and production yield and stable quality.

The invention provides a levamlodipine besylate crystal with the molecular formula being (C20H25ClN2O5) (C6H6O3S) (H2O) 1.5 and the molecular weight being 594.07. Crystallography measurement parameters are a monoclinic system and P21 chirality space groups, and the chirality absolute configuration is determined by crystallography Flack parameter being 0.08(6); the unit cell size is shown in the specification, wherein beta is 95.817(4) degrees, and V is 2880.1(11). The characteristic peak in an X-ray powder diffraction pattern (Cu-Kalpha) is displayed at 2thea being 6.70 degrees, 10.12 degrees, 12.40 degrees, 13.36 degrees, 13.68 degrees, 17.04 degrees, 22.46 degrees and 24.16 degrees. The invention further provides a preparation method and application of the levamlodipine besylate crystal. The levamlodipine besylate crystal has the specific crystal form and the amount of crystal water and specific crystallography main parameters and the exact atom spatial position, the solubleness and stability of existing levamlodipine besylate are improved, the stability and bioavailability of the levamlodipine besylate tablet can be improved, preparation is easy, the cost is low, and the obtained crystal is regular in form, uniform in particle size and suitable for large-scale application and popularization.

The medicine composition for treating hypertension complicated with hyperlipemia and cardiac and cerebral vascular diseases belongs to the field of medicine technology, and aims at raising the comprehensive curative effect. Technologically, the medicine composition consists of levoamlodipine and its medicinal salt, HMG-COA reductase inhibitor and its medicinal salt and medicine carrier, with the content being levoamlodipine 1.25-20 mg and HMG-COA reductase inhibitor 2.5-100 mg. Owing to the adding or synergistic effect of the medicines, the present invention has obviously raised medicinal effect, reduced dosage and obviously lowered side effect.

The invention relates to a pharmaceutical composition of Levamlodipine or its medicinal salts and addition salts with Atorvastatin or its medicinal salts, and the use of the pharmaceutical composition in preparing medicament for treating mixed type hypertension and lipidemia.

A combination of Atorvastatin and L-amlodipine is composed of L-amlodipine or medicated salt thereof, Atorvastatin or medicated salt thereof, alkaline metallic salt, cyclodextrin and derivant thereof, loading agent, disintegrant and lubricant; the combination improves the stability and bioavailability of Atorvastatin and L-amlodipine compound.

The invention relates to a pharmaceutical composition containing a calcium channel blocker (CCB) or the mixture thereof, an angiotonin 3II receptor blocker (ARB) or the mixture thereof, statins or the mixture thereof and a pharmaceutically acceptable carrier, wherein the CCB is selected from l-amlodipine, amlodipine, lacidipine, nitrendipine or the mixture thereof; the angiotonin II receptor blocker is selected from telmisartan, losartan, irbesartan, candesartan or the mixture thereof; and the statins are selected from atorvastatin, simvastatin, ruishufatadine, fluvastatin or the mixture thereof. The pharmaceutical composition is used for treating various high blood pressures and preventing or treating cardiovascular and cerebrovascular diseases relevant to the hypertension, reduces the disease rate and/or mortality rate of the cardiovascular and cerebrovascular diseases and also improves the adaptability for a sufferer taking medicine.

A dripping pill of levamlodipine besylate for treating hypertension and angina pectoris is prepared from levamlodipine besylate and matrix. Its preparing process is also disclosed.

The invention relates to a preparation method of a compound tablet prepared from levamlodipine and olmesartan medoxomil as well as auxiliary materials. The preparation method is characterized in that the compound tablet is prepared by adopting a mode of non-wet granulation and has better quality and stability.

The invention relates to a method for obtaining S-(-)-amlodipine in a splitting manner. The method comprises the following steps: dissolving racemic amlodipine and D-tartaric acid into a mixed cosolvent containg dimethylsulfoxide and urea to carry out a complex reaction, carrying out alkaline treatment, solvent-out crystallization and the like on the S-(-)-amlodipine, the D-tartaric acid and the urea complexes solid sedimentation obtained after the complex reaction is finished, and then obtaining S-(-)-amlodipine pure crystal. The method introduces the other chiral auxiliary reagent-urea in the prior dimethylsulfoxide solution, thus the racemic amlodipine can better react with a splitting agent D-tartaric acid in the cosolvent containing the dimethylsulfoxide and urea, the reaction time islargely shortened, and the reaction does not have special requirements on the water content of the used solvent; the enantiomeric purity of the obtained levamlodipine is over than 99% and the rate ofrecovery is over than 80%. The method can be applied to preparing the intermediate of other chiral medicaments basically meeting the standard of the medical industry, is simple and provides a betterprospect for the preparation of various agents by the amlodipine single enantiomer.

The invention discloses a levamlodipine and telmisartan compound preparation and an optimal compound formulation. In the invention, the combination of the levamlodipine and the telmisartan is used for treating hypertension, good synergic antihypertension effect is obtained between the levamlodipine and the telmisartan, the doses of the levamlodipine and the telmisartan can be reduced while the equivalent and even better antihypertension effect is achieved, and the adverse effect caused by high dose of single drug is reduced. Besides, the telmisartan can obviously improve the tolerance of the levamlodipine, can inhibit heart rate increase caused by the levamlodipine and can reduce the incidence of peripheral edema.

The invention relates to a method for removing maleate of amlodipine maleate, which prepares free base of amlodipine from weak inorganic base, DMF and water as solvent by a settling method. The invention relates to a method for preparing levamlodipine from the amlodipine, which removes dextroisomer through salifying precipitation by using mixed solvent of N, N-dimethylformamide and ethanol and D(-)tartaric acid taken as a chiral reagent, and prepares the levamlodipine through precipitation by adding excessive water. The levamlodipine can be used for preparing levamlodipine besylate.

The invention relates to a pharmaceutical composition containing atenolol, amlodipine, or folic acid compounds and application thereof. The pharmaceutical composition contains an officinal dosage of the atenolol, an officinal dosage of the amlodipine or levamlodipine, an officinal dosage of the folic acid compounds, and a pharmaceutical acceptable carrier. The dosage of the atenolol is between 5 and 50 milligrams, the dosage of the amlodipine or the levamlodipine is between 0.5 and 5.0 milligrams, and the dosage of the folic acid type compounds is between 0.2 and 1.6 milligrams. The pharmaceutical composition has the following advantages: the pharmaceutical composition enhances the hypertension curative effect through multi-target synergistic hypotensive action, and reduces the taking dosage of the amlodipine simultaneously, that is, just about one fourth of the original dosage can achieve the same hypotensive effect and reduce the side effects and medical expenses; and more importantly, the pharmaceutical composition can effectively prevent and treat or delay various complications of high blood pressure cardiovascular and cerebrovascular diseases such as cerebrovascular disorder and the like through dual targets (Hcy and blood pressure) on the basis of reducing toxic side effects. Besides, the pharmaceutical composition ensures that patients can take medicine conveniently.

The invention provides a slow/controlled release preparation of a medicine composition for treating hypertension. The slow/controlled release preparation composition contains levorotatory amlodipine and an angiotensin II receptor blocking agent which are in a specific proportion. Compared with a common preparation, the slow/controlled release preparation provided by the invention can enhance the effect of lowering the pressure, lower the pressure more stably, improve the insulin resistance of a patient more effectively and better prevent organ injuries caused by the hypertension.

The invention belongs to the field of chemical pharmacy, and particularly relates to a preparation method of high-purity levamlodipine besylate, which comprises the following steps: (1) under the protection of nitrogen, dissolving levamlodipine in proportional hot water, adding a water solution of benzenesulfonic acid until the solid is completely dissolved, slowly cooling to precipitate a laminar solid, and filtering to obtain a crude levamlodipine besylate product; and (2) under the protection of nitrogen, dissolving the crude levamlodipine besylate product in proportional ethanol until the crude levamlodipine besylate product is completely dissolved, dropwisely adding proportional water to precipitate a solid, and filtering to obtain the refined levamlodipine besylate product. The invention successfully solves the problem of great filtration difficulty in the past patent technique; and thus, the quality of the end levamlodipine besylate product is excellent, and the HPLC content (area normalization) is almost 100%.

The invention provides levamlodipine besylate tablets. The levamlodipine besylate tablets have the characteristics of high stability, low impurity content, complete dissolution and the like.