苦参为豆科植物苦参的干燥根。春、秋二季采挖,除去根头和小支根,洗净,干燥,或趁鲜切片,干燥。苦参性味苦,寒。归心、肝、胃、大肠、膀胱经。具有清热燥湿,杀虫,利尿之功效。用于热痢,便血,黄疸尿闭,赤白带下,阴肿阴痒,湿疹,湿疮,皮肤瘙痒,疥癣麻风;外治滴虫性阴道炎。苦参始载于《神农本草经》,列为中品。《名医别录》载:“叶极似槐叶,花黄色, Sophora flavescens is the dry root of Sophora flavescens. In the spring and autumn seasons, excavation is carried out to remove the roots and small roots, wash, dry, or immerse fresh slices and dry them. Matrine is bitter and cold. Heart, liver, stomach, large intestine, bladder. With heat dampness, insecticide, diuretic effect. For heat phlegm, hematochezia, jaundice, urine closure, Chibai vaginal discharge, Yin Yin and pruritus, eczema, sore, itchy skin, castor wind; external trichomonal vaginitis. Sophora flavescens was firstly contained in the ”Shen Nong Ben Cao Jing“ and was listed as a middle product. ”Doctors don’t record“ contains: ”The leaves are very similar to the leaves, yellow flowers,