Study on index for formulation optimization of sustained or controlled released dosage forms Comparative Study on in vitro drug-release between Tuizhang ophthalmic gel and Tuizhang oculentum Determination of dissolution of Liuwei Dihuang concentrated pills based on multi-index components Dissolution of tanshinone ⅡA from Xianling Gubao capsule Comparative study on dissolution of Xianlinggubao capsulesprepared by different processes Evaluation of group clustering synchronization release of Daidai Flavones Dropping Pills based on characteristic spectrum Preparation of silybin controlled-release formulations and study on their release mechanism Application of multicomponent dissolution evaluation method of biopharmaceutics classification system of Chinese materia medica in Gegen Qinlian tablets Quality evaluation of Shenqi Sherong Pill