味甘微溫．入手足太陰經(jīng)．功專益氣．得當(dāng)歸、活血．得白術(shù)、補(bǔ)氣．得防風(fēng)其功益大．得滑石、白糖煎服．治洞泄完谷不化神效．合人參、甘草、生姜為保元湯．治痘虛不起．或加芎 、官桂糯米助之．生涼炙溫．生用或酒炒達(dá)表．蜜炙補(bǔ)中．鹽水炒補(bǔ)腎．茯苓為使．惡龜甲、白蘚皮．畏防風(fēng)．氣旺者禁用．陰虛者宜少用．