地黄为玄参科植物地黄的块根,有生地黄和熟地黄之分。熟地黄又以炮制时加酒与否,而分酒熟地黄和蒸熟地黄。但近年来经豫北医专等单位研究证明,酒熟地黄和蒸熟地黄的药理作用、化学成分及临床疗效基本相似,故统称为熟地黄。地黄为滋补肾阴的药物,干地黄滋阴养血,熟 Rehmannia glutinosa is the root of Radix Scrophulariaceae, which is composed of Rehmannia glutinosa and Rehmannia glutinosa. Rehmannia glutinosa reprocessed rehmannia yellow and steamed yellow. However, in recent years, Henan University of Medicine and other units have shown that the pharmacological effects, chemical composition and clinical efficacy of Rehmannia Rehmanniae and Steamed Rehmannia are similar, so they are collectively known as Rehmannia. Rehmannia is a medicine that nourishes kidney yin.