延胡索乙素(以下简称乙素,它的左旋体即为颅通定)的镇痛效能和镇静、催眠作用,已为药理试验和临床使用所证实,并认为它的作用与吗啡和巴比妥类的作用有所不同。已知麻醉性镇痛剂均能产生成瘾性;镇静催眠剂,如巴比妥、眠而通长期大剂量服用后,突然停药也会出现惊厥或死亡。那么,乙素是否有这些症状急 The analgesic efficacy and sedative and hypnotic effects of Tetrahydropalmatine (hereinafter referred to as B, its levofrequency is Cranilone) have been demonstrated for both pharmacological and clinical use and are believed to be associated with morphine and barbiturate The role of the class is different. Known narcotic analgesics can produce addictive; sedation hypnotics, such as barbiturate, sleep and long-term high-dose, abrupt withdrawal may appear convulsions or death. So, B whether these symptoms are urgent