药典规定何首乌的炮制为:首乌的片(块)加10%黑豆汁按炖法制成显棕红色。对其炮制机理和炮制时间的讨论目前仍有争议。我们结合多年来医院炮制首乌的方法进行下述实验,试图为此提供依据。一、化学部分药材:产地江苏,经宁夏药检所杨晓春同志鉴定为蓼科植物何首乌(Polygonum mul-tiflorum Thunb.)干燥块根。批号830403。首乌样品:A.清蒸炖制;B.10%黑豆汁 The pharmacopoeia stipulates that the preparation of Polygonum multiflorum should be as follows: Shouwu’s tablets (blocks) plus 10% black bean juice should be brownish-red in accordance with the stew method. The discussion of its concocting mechanism and processing time is still controversial. We have carried out the following experiments in conjunction with the method used by the hospital for the preparation of Shouwu for many years, trying to provide a basis for this. First, the chemical part of the medicinal materials: Origin of Jiangsu, Ningxia Institute for Drug Control by Yang Xiaochun identified as Polygonum multiflorum (Polygonum mul-tiflorum Thunb.) Dry rooting. Lot number 830403. Shouwu sample: A. steamed stew; B.10% black bean juice