Objective To observe the efficacy of yindan xinnaotong capsules on the frequent posterior circulatory transient ischemic attack( TIA). Methods Eighty patients of frequent posterior circulatory TIA were randomized into a control group and a treatment group according to the hospital admission sequence. In the treatment group,yindan xinnaotong capsules and clopidogrel tablets were prescribed for oral administration. In the control group,clopidogrel tablets were prescribed for oral administration. The clinical ...