乌药别名天台乌药,为樟科植物乌药的干燥块根,始载于《本草拾遗》,具有很好的行气止痛,温肾散寒的功效,常用于寒凝气滞,胸腹胀痛,气逆喘急,膀胱虚冷,寒疝,经寒腹痛等证的治疗。乌药原植物为常绿灌木或小乔木,生长于南方地区灌木丛林,小枝幼时密生锈色毛。根有纺锤状或结节状膨大,叶互生,革质上面绿色,有光泽,下面灰白色,幼时密被棕褐色柔毛,后渐脱落。历史上素以浙江天台所产的乌药为道地药材,故有“天台乌药”或“台乌药”之称。一般在11月至次年3月采挖,除去须根, Ungraphic alias rooftop black drug, is a dry root of lauricaceae Ustilago medicine, is contained in the “Materia Medica”, with good qi and relieve pain, warm kidney and cold effect, commonly used in cold and Qi stagnation, chest and abdominal pain , Gas anti-asthmatic, bladder virtual cold, cold hernia, cold and other evidence of treatment. Umbellata original plants are evergreen shrubs or small trees, growing in the southern shrub jungle, young branches dense rusty hair color. Root spindle or nodular enlargement, leaves alternate, leather top green, shiny, gray below, when young was densely brown pilose, then gradually fall off. Historically, the wuyao produced on the rooftop of Zhejiang province was used as the authentic medicine, so it is called “rooftop medicine” or “Taiwan’s medicine”. Generally in November to March next year excavation, remove the fibrous roots,