补阳还五汤重用黄芪体现了补气活血的功能.但临床上应用补阳还五汤的黄芪的用量多少不一,为此,以动物实验从补气与活血两方面探讨了黄芪的用量对补阳还五汤作用的影响.结果表明：黄芪用量为15g和30g时,补阳还五汤即具有较好的抗应激性、增强免疫、体内抗栓、体外抗凝等方面的作用,比用120g作用强,且具有显著性差异(P＜0．05).

Astragalus membrannceus (AM)plays an im portant role in the traditional Chinese recipe"Decoction of Invigorating Yang for Recuperation" (DIC) as the main ingredient which invigorates Qi and promotes blood circulation. But in clinics,doses of A M used in the recipe often varies. For the purpose to investigate the effect of different doses of A M on the anion of DIC,animal experiments were designed and studied. Rsults showed that when the doses of AM were 15 and 30g,the resulting DIC showed a better antiirritability.and enhancing immunity effects ,as well as in vivo antithrombosis and vitro anticoagulation actions as compared to a dose of 120g AM in DIC (P<0.05).