味淡．入足少阴经．功专补肾阴．菟丝补肾之阳．同用则生精补阳．骤用恐妨心滑大便．功用与琐阳相仿．禁忌亦同．酒浸一宿．刷去浮甲劈破．除内筋膜．酒蒸半日酥炙用．忌铁．草苁蓉功力稍劣．