使药是中医方剂的重要组成部分。本实验研究了中医名方“逍遥散”中使药薄荷的主要有效成分薄荷醇对柴胡镇痛作用的影响，发现薄荷醇单独使用虽无镇痛作用，但可增强柴胡的镇痛作用。研究结果提示，使药增强主药作用的主要原因，与使药的药理作用关系不大，提高主药的生物利用度可能是其作用原理之一 Make medicine is an important part of Chinese medicine prescription. This experiment studied the effect of menthol, the main active component of Mentha montana, on the analgesic effect of Bupleurum chinense, and found that menthol alone had no analgesic effect, but it could enhance the analgesic effect of Bupleurum chinense. . The results of the study suggest that the main reason for the drug to enhance the action of the main drug has little to do with the pharmacological action of the drug, and improving the bioavailability of the main drug may be one of its principles.