Objective: To study the pharmacodynamics of compound Shechuang tinctures, including bactriostasis, anti-inflamma- tion and relieving itching to provide the pharmacodynamie basis for the clinical application. Method: The minimum inhibitory concen- tration (MIC) was determined by tube double dilution method. The effect of compound Shechuang tinctures on swelling was observed by the methods of mouse ear swelling caused by xylene and rat joint swelling caused by carrageenan. The effect of the preparation on itching threshold was observed by itc...