桂枝汤原载于汉代张仲景氏所著之《伤寒杂病论》一书 ,为后世医家所习用并奉为治疗外感发热之经典方剂之一。我们应用本方传统煎剂治疗外感发热风寒证 10 0例并与同期使用正柴胡饮冲剂 5 0例作随机对照观察 ,现报告于下。1　一般资料根据卫生部《中药新药临床研究指导原则》及 Guizhi Tangyuan was published in the book “Treatise on Febrile and Miscellaneous Diseases” written by Zhang Zhongjing in the Han Dynasty. It is one of the classical prescriptions for treating exogenous fever. We applied this traditional decoction to treat 100 cases of exogenous fever and cold syndrome and compared it with 50 cases of Zhengchaihu drinking granule in the same period. 1 General information according to the “Guidelines for clinical research of new Chinese medicines” of the Ministry of Health and