申请人:Dexcel Pharma Technologies Ltd.
公开号:EP1731142A1
公开(公告)日:2006-12-13
The invention provides a delivery device for the delayed release of an active agent in the gastrointestinal tract comprising a core, comprising an active agent; a first outer coating, comprising a relatively hydrophobic substantially water insoluble polymer having substantially water insoluble hydrophilic particles embedded therein; and a first inner coating layer, comprising an agent that can cause the dissolution of at least one of the water insoluble components of the outer coating, and optionally a water soluble polymer, such that the insoluble particles in the outer coating, upon absorption of liquid, form channels leading to the inner coating layer, thus enabling the dissolution thereof, whereby the agents contained therein are released to cause the dissolution and/or degradation (destruction) of the outer coating, and the release of the pharmaceutically acceptable active agent from the core of the device.
本发明提供了一种用于在胃肠道中延迟释放活性剂的给药装置,该装置包括一个内核,内核中含有活性剂;一个第一外涂层,外涂层中含有相对疏水的基本上不溶于水的聚合物,聚合物中嵌入了基本上不溶于水的亲水颗粒;第一内涂层层,包括可导致外涂层中至少一种水不溶成分溶解的药剂,以及可选的水溶性聚合物,从而使外涂层中的不溶性颗粒在吸收液体后形成通向内涂层层的通道,从而使其溶解,其中所含的药剂由此释放出来,导致外涂层溶解和/或降解(破坏),并从装置核心释放出药学上可接受的活性剂。