Object:Available compositions abstracted from Buyanghuanwu decoction and their compatibilities on antagonisming experimental cerebral ischemia.Method:Seven available compositions were abstracted from Buyanghuanwu decoction. Effects of each available composition on cerebral ischemia in mice induced by ligating bilateral common carotid artery and Vagus were studied.Interaction and the combination of effective dose of each composition were studied with orthogonal test.Result:1)Total alkaloids,Polysaccharides,saponins,aglycones and volatiles applied alone could prolong obviously the time of ischem...