Objective      To identify 2 active ingredients and determine the contents of ferulic acid in Xiaozhen Zhiyang capsules.       Methods      Thin layer chromatography (TLC) was used for qualitative identification of chebula Fructus

and Ephedrae Herbap. The content of Ferulic acid from Rhizoma Chuanxiong was determined by HPLC.       Results      The identification method was of high specificity with clear thin layer chromatography spots. The negative control did not impose any disturbance. In HPLC

the chromatographic peak of ferulic acid was well isolated from other peaks. There was a good linear relationship between the peak area and the sample size in a range of 0.053 8 to 0.322 8 μg(r=0.999 9). The average recovery of ferulic acid was 100.30%

RSD=0.96% (n=9).       Conclusion      The method is a simple and accurate assay of good reproducibility. lt can be used for the quality control of Xiaozhen Zhiyang capsules.