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早在公元二世纪,《神农本草经》一书就将地黄列为上品,认为本品气味甘寒,无毒,主填骨髓,长肌肉,可以久服。历经十八个世纪的临床检验,各医家都证实它在临床上有极其广泛的功用,是一味滋阴补血,清热凉血的药物,多用于温病、热病、消渴病,阴虚白喉、妇科月经不调以及温病后津液亏耗等病证。本品由于加工炮制的不同,饮片有鲜地黄即生地黄、干地黄与熟地黄三种,临床运用有别。地黄系玄参科地黄属,主产于辽宁、河北、山西、内蒙古、河南、安徽等地。国内以怀庆地黄的根状茎为正品,质优,另有浙江杭州笕桥地区出产的称为笕桥地黄,也可入药,但质较差。地黄根状茎被挖出土后,乘鲜貯藏于砂土中即称生(鲜)地黄;如用水稍浸,闷一夜,待皱皮展开,次日用清水将外皮皱纹内
As early as the second century AD, the book “Shen Nong Ben Cao Jing” listed Huang as the top grade, thinking that this product is chilly and non-toxic, and the main body fills up the bone marrow and has long muscles and can serve for a long time. After 18 years of clinical inspection, all doctors have confirmed that it has a very wide range of clinical functions. It is a medicine that can nourish yin and nourish blood, clear away heat and cool blood, and is mostly used in fever, fever, diabetes, and yin deficiency. Gynecological irregular menstruation, and fluid loss after febrile illness syndrome. Due to the differences in processing and processing, this product has three types of fresh yellow, namely, raw yellow, dried yellow and rehmannia. Huang Huang is a yellow genus of Scrophulariaceae, mainly produced in Liaoning, Hebei, Shanxi, Inner Mongolia, Henan, Anhui and other places. The rhizome of Huaiqing Rehmannia is genuine and of high quality in China, and it is also known as Radix Rehmanniae, which is produced in the Lanqiao area of Hangzhou, Zhejiang Province. It can also be used as a medicine, but its quality is poor. After the root rhizomes of Rehmannia glutinosa are excavated, they are freshly stored in the sand and they are said to be raw (fresh) yellow; if soaked with water, stuffy overnight, wrinkle skin unfolds, and the skin wrinkles the next day with water