申请人:Takeda Chemical Industries, Ltd.
公开号:US05876756A1
公开(公告)日:1999-03-02
A microcapsule contains a pharmaceutically effective amorphous water-soluble 2-piperazinone-1-acetic acid compound or salt thereof and a polymer binder and a method of preparing said microcapsule. The microcapsule is produced by dispersing in an aqueous phase a dispersion of the amorphous water-soluble 2-piperazinone-1-acetic acid compound or salt thereof in a solution of a polymer in an organic solvent to give an s/o/w type emulsion and subjecting the emulsion to in-water drying. The sustained-release microcapsule entraps 2-piperazinone-1-acetic acid compound or the salt thereof, as a drug, in high concentration, and in reducing the initial release of the drug, thereby reducing undesirable side effects of the drug.
一种微胶囊含有一种药效明显的无定形水溶性2-哌嗪酮-1-乙酸化合物或其盐以及一种聚合物粘合剂,以及制备该微胶囊的方法。通过在水相中分散一种无定形水溶性2-哌嗪酮-1-乙酸化合物或其盐的分散液在有机溶剂中的聚合物溶液中以形成s/o/w型乳液,并将该乳液暴露于水中干燥来生产该微胶囊。这种缓释微胶囊将2-哌嗪酮-1-乙酸化合物或其盐作为药物高浓度地封装在内,并通过减少药物的初始释放来减少药物的不良副作用。