中文摘要：

亲水凝胶骨架缓释片的释药过程与相转变过程、凝胶层屏障及区域前沿移动行为密切相关。综述了近几年研究其释药机制的方法。

英文摘要：

The phase transition, barrier function and front movement of the gel layer are closely related to drug release process of hydrophlic gel matrix sustained-release tablets. The evaluation methods for release mechanism of hydrophlic gel matrix sustained-release tablets in recent years are reviewed.