Provided in the present invention is a pharmaceutic osmotic pump preparation comprising a tablet core, wherein the tablet core contains drugs (or pharmaceutically active ingredients) and materials forming a chamber structure; and a coating film coating the tablet core where a drug release hole is set; wherein when the pharmaceutic osmotic pump preparation releases drugs in water or an aqueous medium, the materials forming the chamber structure lead to the formation of a superfine chamber structure in the coating film, and the total volume of the superfine chamber structure Vb gradually increases over the releasing time, but the releasing rate R (or release amount A) of the pharmaceutically active ingredients is proportional to Vb. The osmotic pump preparation of the present invention is suitable for water-soluble drugs and water-insoluble drugs, and especially is suitable for the controlled release of low solubility drugs or pH dependent drugs.
本发明提供了一种药用渗透泵制剂,包括片芯,其中片芯包含药物(或药用活性成分)和形成腔室结构的材料;以及包覆在片芯上设置药物释放孔的包衣膜;其中,当药物渗透泵制剂在
水或
水介质中释放药物时,形成腔室结构的材料导致在包衣膜中形成超细腔室结构,超细腔室结构的总体积 Vb 随释放时间逐渐增大,但药物活性成分的释放速率 R(或释放量 A)与 Vb 成正比。本发明的渗透泵制剂适用于
水溶性药物和
水不溶性药物,尤其适用于低溶解度药物或 pH 依赖性药物的控释。