AIM:To establish a HPLC method for determining contents of tetrahydropalmatine and pepper alkali in Zhitong Capsule(Rhizoma Corydalis,Fructus Piperis,Radix Paeoniae alba,etc.

• 目的:建立同时测定止痛胶囊(延胡索,胡椒,白芍等)中延胡索乙素和胡椒碱含量的测定方法,更有效地控制制剂的质量。