Objective: To observe the effect of Yangxue Qingnao Granules in the treatment of vertigo due to vertibrobasilar ischemia. Method: 66 cases were randomly divided into a treatment group and a control group. The patients in the treatment group were treated by Yangxue Qingnao Granules while those in the control group were given Flunarizine Hydrochloride Tablets orally. Result: The total effective rate of the former was much higher than that of the latter, which was significantly different (P<0.01). After treatm...