52 results about "Racecadotril" patented technology

The invention discloses a racecadotril liposome solid preparation. The racecadotril liposome is prepared from racecadotril, soy lecithin, hydrogenated egg lecithin, cholesterol and tween 80 in the weight ratio of 1:2-8: 2-8:1.5-6:0.5-3; and the solid preparation is prepared from the racecadotril liposome and other pharmaceutically common auxiliary materials. The other pharmaceutically common auxiliary materials comprise filler, a disintegrating agent, a sweetener, an adhesive and a lubricant. The racecadotril liposome solid preparation improves the dissolubility of the racecadotril so as to improve bioavailability; a medicament is absorbed and distributed in a body fast; a curative effect is improved obviously; and the product quality of the preparation is improved and the toxic and side effects are reduced.

The invention provides a dry suspension agent containing racecadotril and the preparation method. The dry suspension agent provided in the invention contains a basic remedy ingredient with physiological available quantity and a carrier acceptable in pharmacy. The preparation method of the dry suspension agent containing racecadotril in the invention is characterized in that the basic remedy ingredient is firstly fixed evenly with a thinner and a suspending agent, then fixed with a wetting agent to produce granules in wet process, and finally fixed evenly with a corrective. The preparation method can hide the bitterness of medicine and guarantee the settling volume ratio of the dry suspension agent.

The invention relates to the field of medicinal preparations, and particularly relates to racecadotril granules and a preparation method thereof. The racecadotril granules are prepared from the following raw materials by weight: 0.1-2 parts of racecadotril, 93-99 parts of an excipient, 0.02-2 parts of a corrigent, 0.01-0.1 part of an adhesive and 0.05-1 part of a suspending agent. The racecadotril granules are prepared by suspending racecadotril in the adhesive and dissolving partial sucrose in the adhesive, so that bitter taste of a drug can be covered. The prepared racecadotril granules have relatively good granulation effect, and increase compliance of children.

The invention provides a racecadotril suspension, which is composed by the following ingredients: 1 part of racecadotril, 1-3 part(s) of mannitol, 5-9 parts of carboxymethylcellulose odium, 150-200 parts of cane sugar, 1-6 part(s) of ploxamer and 1-6 part(s) of aerosil. The racecadotril suspension has well stability and other pharmaceutical effects, because the flavoring agent is utilized, the racecadotril suspension not only solves the bad taste problem, but also surprisingly has the quick effect and high bioavailability, is better applied in clinic, and is particularly used as pediatrics pharmaceutical preparations.

The invention relates to a preparation method of racecadotril. The method comprises the following steps: (1) enabling thioacetic acid to react with 2-benzylacrylic acid to prepare an intermediate 3-acetyl mercapto-2-benzyl propanoic acid; (2) carrying out amidation on the intermediate 3-acetyl thiol-2-glycin benzyl propionic acid and glycine benzyl ester p-toluenesulfonate salt under existence of a catalyst to generate the racecadotril. By adopting the method, the racecadotril with high yield and purity can be obtained, the defect of the original technology is compensated, pollution is reduced, and the cost is reduced. Thioacetic acid is used as a solvent and is also used as a reaction reagent, reaction process is simple and rapid, few reagents are used, and the purity and the yield are greater than or equal to 95%; EDCI or DCC is selected as a condensation reagent; a mixed solvent is used for crystallization, the influence on product yield is small, and impurity removal effect is good; the overall technology adopts a one-step to synthetize, simple, efficient, high in atom economy, more green and environment-friendly, and the racecadotril product which is high in yield, and accords with the EP quality standard can be obtained.

The invention relates to a preparation method of racemic N-[2-acetyl mercapto) methyl]-1-oxygen-3-phenyl propyl] glycine benzyl ester (racecadotril), which is essentially prepared by amidation reaction of 2-benzyl-3-thio-acetyl propionyl halide and glycine benzyl ester salt or glycine benzyl ester. Compared with the prior art, the invention has short reaction process, high yield. The prepared racecadotril is mainly used for the treatment of acute diarrhea for adults and children.

The invention belongs to the field of pharmaceutical preparations, and in particular relates to a racecadotril particle for treating infantile diarrhea as well as a preparation method thereof. The pharmaceutical particle is a solid preparation which is prepared in the following steps: firstly, carrying out clathration on racecadotril by cyclodextrin or a cyclodextrin derivative; and then, matching with a diluent, an adhesive, a disintegrating agent, a flow aid and a corrigent or other pharmaceutically accepted auxiliary materials. The particle provided by the invention effectively solves the problem of difficult administration and bad taste for children and better satisfies the clinical demands.

The invention relates to a racecadotril compound and a novel preparation method thereof. In particular, neutral alumina with a specific size is taken as a fixed phase, a mixed solvent consisting of ethanol and ethyl acetate according to a certain proportion is taken as a mobile phase, and a column temperature is kept higher than the room temperature, so that racecadotril can be refined and purified efficiently, high yield and high purity are achieved, and the method is an effective method for obtaining high-purity racecadotril. By the racecadotril obtained by the method, the product quality of a preparation is enhanced, and the clinical toxic and side effects of the racecadotril compound on the preparation of antidiarrheic medicaments are reduced.

The invention discloses a preparation method of racecadotril intermediate 2-(benzyl acrylamide) benzyl acetate, which comprises the following steps of: (1) taking 2-benzyl acrylic acid halide to react with glycinate so as to prepare 2-(benzyl acrylamide) acetic acid for standby; and (2) taking the 2-(benzyl acrylamide) acetic acid to be subjected to the catalytic esterification reaction with benzyl alcohol so as to prepare the 2-(benzyl acrylamide) benzyl acetate. In the step (1), the reaction between the 2-benzyl acrylic acid halide and the glycinate is carried out in a mixed phase of an organic solvent and an aqueous phase, and the reaction between the 2-benzyl acrylic acid halide and the glycinate is carried out in the presence of an acid-binding agent; in the step (2), the molar ratio of the 2-(benzyl acrylamide) acetic acid to the benzyl alcohol is 1:1.5-2, the catalyst is sodium toluenesulfonate or N,N-dimethylamino pyridine, and the use amount of the catalyst is 1%-2% of the molar weight of the 2-(benzyl acrylamide) acetic acid. With the adoption of the preparation method of the racecadotril intermediate 2-(benzyl acrylamide) benzyl acetate, the defects of the prior art can be overcome, and thus, the pollution is lowered, and the manufacture cost is lowered.

The invention discloses a compound oral liquid for treating children diarrhea and a preparation method thereof. The compound oral liquid for treating the children diarrhea comprises the following components of Nutrilite Double powder, dideoxyinosine, gastrodia elata polypeptide, disaccharidase, ribavirin, racecadotril, bismuth pectin, hydrotalcite, dry yeast, probiotics, potassium chloride, sodium chloride, sodium lactate, calcium gluconate, corrigent, emulsifying agent, buffer liquid, and antioxidant. The compound oral liquid for treating the children diarrhea has the advantages that the environment of children gastrointestinal tracts is improved, the effective microbial community is increased, the digestion and adsorbing of gastrointestinal tract are promoted, the water-electrolyte metabolic disorder is prevented, and the body immunity is improved; the cost is low, the toxic or side effect is little, the compound oral liquid can be used for a long time, and the children diarrhea can be prevented and thoroughly cured after long-time administration.

A lipid composition comprising racecadotril, at least one surfactant and a lipid.

The invention belongs to the technical field of crystal forms and preparation of drugs and particularly relates to an alpha crystal form of racecadotril and a preparation method of the alpha crystal form. The alpha crystal form of racecadotril is characterized in that the reflection angle 2theta shows X-ray powder diffraction peaks at sites of 4.2-4.3 degrees, 8.7-8.8 degrees, 13.2-13.3 degrees, 16.7-17.8 degrees, 17.7-17.8 degrees and 19.9-20.0 degrees and shows infrared absorption peaks at sites of 1135-1136cm<-1>, 1551-1553cm<-1>, 1644-1645cm<-1>, 1687-1688cm<-1>, 1731-1732cm<-1> and 3287-3290cm<-1> in an X-ray powder diffraction diagram. The preparation method comprises the following steps of dissolving racecadotril in a solvent, heating until racecadotril is dissolved, then standing still for crystallization, filtering, and drying. The prepared alpha crystal form of racecadotril is high in purity and stable; the preparation method is simple in process and easy to implement, the yield is 70%-80%, and the purify of the alpha crystal form is more than or equal to 99.0%.

The invention discloses a compounding method for a racecadotril intermediate. The compounding method comprises the following steps: causing ethyl phenylpropiolate, dimethylamine and trioxymethylene react with each other, treating with hydrochloric acid to obtain benzyl ethyl acrylate, and then hydrolyzing under an alkaline condition, thereby obtaining benzyl acrylic acid. According to the compounding method disclosed by the invention, benzyl chloride with higher toxicity is replaced by ethyl phenylpropiolate, the compounding route is shortened, the production efficiency is increased, and thus the compounding method is suitable for industrial production.

The invention discloses racecadotril granules. Based on 100 bags, the racecadotril granules comprise the following raw medicinal materials and medicinal auxiliary materials in parts by weight: 5g-15gof racecadotril, 1g-5g of coconut oil, 800g-1200g of filler, 100g-200g of an adhesive and 100g-200g of ethanol. The invention also discloses a preparation method of the racecadotril granules. The preparation method comprises the following steps: mixing and stirring ethanol and coconut oil to form a micro-emulsion to increase the solubility of racecadotril; and then adding 1-5% of filler, wherein asmall amount of filler can play a role in a cosolvent accidently, so that the dissolution rate of the racecadotril granules is improved greatly. By adding a lot of filler to modify the taste and cover the bitterness of racecadotril, so that the taste of a drug is improved. The racecadotril granules avoid phenomena that the racecadotril granules prepared by an existing preparation method are poorin taste, poor in dissolution rate and hard to store, and the percent of pass of the product is improved greatly.

The invention discloses a pharmaceutical preparation containing racecadotril and a preparation method thereof, and belongs to the field of pharmaceutical preparations. The preparation comprises racecadotril, a taste masking material, a filling agent, a flavoring agent and a lubricant, the taste masking material is composed of NE30D and ethyl cellulose fine powder according to a certain proportion, and further aggregation of an acrylate copolymer is prevented through formation of an incompatible phase between ethyl cellulose and acrylate copolymer particles; the water vapor permeability and tension of the membrane are improved, so that the drug release rate is stabilized, the bitter taste of the drug is effectively covered, and the membrane is suitable for acute diarrhea treatment of infant and child patients; the product stability is good; the preparation method has the advantages of good drug entrapment performance, good taste masking effect, and simple preparation process by adopting a conventional wet granulation process, and is more suitable for industrial production.