Microparticles With Modified Release of At Least One Active Principle and Oral Pharmaceutical Form Comprising Same
申请人:Dargelas Frederic
公开号:US20090220611A1
公开(公告)日:2009-09-03
The invention concerns microparticulate systems with modified release of oral active principle(s). The invention aims at providing a novel pharmaceutical with time-dependent and pH-dependent release mechanism, enabling: a) the latent period preceding the release of the active principle in the stomach; b) the pH triggering the release of the active principle in the intestine; c) the release speed of the active principle. This is achieved through the use of coated microparticles made from particles of active principle each coated with two coating films A and B. A comprises: film-forming (co)polymer (A1) insoluble in fluids of the gastrointestinal tract; ethylcellulose (co)polymer (A2) soluble in fluids of the gastrointestinal tract; plasticizing polyvinylpyrrolidone (A3); castor oil/optionally a surfactant and/or magnesium stearate lubricant (A4). B comprises a hydrophilic polymer (B1) bearing ionized groups with neutral pH (EUDRAGIT® L100-55) and a hydrophobic compound (B2) (LUBRITAB®). The invention also concerns medicines based on said microparticles.
该发明涉及具有口服活性原理改性释放的微粒系统。该发明旨在提供一种具有时间依赖性和pH依赖性释放机制的新型药物,实现:a)在胃中释放活性原理之前的潜伏期;b)在肠道中触发释放活性原理的pH值;c)活性原理的释放速度。这是通过使用由活性原理颗粒制成的被包覆的微粒来实现的,每个微粒都涂有两层涂膜A和B。A包括:在胃肠道液体中不溶解的成膜(共)聚合物(A1);在胃肠道液体中可溶解的乙基纤维素(共)聚合物(A2);增塑剂聚乙烯吡咯烷酮(A3);蓖麻油/可选的表面活性剂和/或硬脂酸镁润滑剂(A4)。B包括具有中性pH的离子化基团的亲水性聚合物(B1)(EUDRAGIT® L100-55)和疏水化合物(B2)(LUBRITAB®)。该发明还涉及基于这些微粒的药物。