I studied conductant drug(使藥) in a prescription. As results of these studies, conductant drug(使藥) with meaning of medicinal guide(引經) were Achyranthis Bidentatae Radix(牛膝), Platycodi Radix(桔梗), Cinnabaris(朱砂), Sal Maritimus(食鹽), alcoholic drink(酒,) Cimicifugae Rhizoma(升麻) and Bupleuri Radix(柴胡). Conductant drugs with meaning of harmonizing medicines in a prescription were almost Glycyrrhizae Radix(甘草). And sometimes Mel(蜂蜜) was used with meaning of harmonizing medicines in pill. And Jujubae Fructus was used with meaning of harmonizing medicines in purgation medicines.