Preparation method for L-oxiracetam oral preparation

Abstract

The invention relates to a preparation method for an L-oxiracetam oral preparation. The L-oxiracetam oral preparation is prepared by adopting materials, such as a composite membrane-forming material, a plasticizer and a filler. By means of the combination of the specific composite membrane-forming material, the plasticizer and the filler, the preparation method uses a membrane coating machine to prepare the L-oxiracetam oral membrane, and strictly controls the thickness of the membrane, coating speed and drying temperature, thus stabilizing the process and ensuring the quality of the product, and thereby the brittleness, disintegration time, solution time and other aspects of the L-oxiracetam oral preparation are more favorable for clinical application.

Description

Technical field [0001] The invention relates to a method for preparing an oral preparation of Levoxiracetam. Background technique [0002] Oxiracetam is a synthetic cyclic derivative of hydroxyaminobutyric acid (GABOB), which can promote ATP in the brain, promote the synthesis of acetylcholine and enhance the conduction of nerve excitement. It has an improved effect on retrograde amnesia caused by hypoxia. Can enhance memory and improve learning ability. L-Oxiracetam ((S)-4-hydroxy-2-oxo-1-pyrrolidine acetamide) is the L-body of Oxiracetam (Oxiracetam CAS 62613-82-5), white microcrystalline powder , The melting point is 135~136℃, the optical rotation is -36.0°(C=1.00in water), the solubility of L-Oxiracetam is obviously better than that of the mixed body. Levoxiracetam has not been reported as a single drug. [0003] CN104069074A discloses a freeze-dried preparation of oxiracetam for injection, which is prepared by first forming an aqueous solution of oxiracetam with a certain c...

AI Technical Summary

Problems solved by technology

This type of preparation is directly injected into tissues or blood vessels, and there is no absorption process or the absorption process is very short, so the blood concentration can quickly reach the peak to play a role; Most require higher equipment conditions, and the drugs in the injection are generally dispersed in water as micron-sized solid particles in the molecular state, with a large degree of dispersion, and high-temperature sterilization often results in drug hydrolysis, oxidation, and solid particle coalescence Stability issues such as large size

At the same time, because the injection directly and quickly enters the human body without the protection of the normal physiological barrier of the human body, if the dosage is improper or the injection is too fast, or there is a problem with the quality of the drug, it may bring harm to the patient, or even cause irreparable consequences.

In addition, injection pain, inability to administer drugs by the patient, local induration of injection, and vascular inflammation caused by intravenous injection are all problems in clinical application.

[0004] CN101732251A discloses a liposome of oxiracetam, which is prepared from oxiracetam, phospholipids, cholesterol, Tween 80 and an appropriate amount of osmotic pressure regulator and buffer solution; the liposome has good stability and encapsulation efficiency High, low toxicity and side effects; but the liposome preparation process is complicated, not suitable for large-scale production; more importantly, the curative effect of liposomes in the human body remains to be further studied, and there are few liposome preparations for clinical use in China at present

Oral dispersible tablets also have the problem of choking, but sucking dispersible tablets has a very slow onset of action, and there is a gritty and bitter taste, which is not conducive to taking

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