患者叶××,男,36岁。因发作性左上肢麻木、抽搐、继之全身抽搐伴意识障碍14个月而服用苯妥因钠(每日0.3克),以后间断服用。后因头昏、走路不稳一个月,于1985年7月27日入华山医院神经内科,脑电图发现基本脑电活动变慢。疑有苯妥钠中毒,遂抽血测苯妥钠浓度,血清中苯妥钠浓度高达85μg/ml,再追问病史,原来患者自1985 Patient × ×, male, 36 years old. Due to episodes of left upper limb numbness, convulsions, followed by systemic convulsions with disturbance of consciousness for 14 months and taking phenytoin sodium (0.3 grams per day), after taking intermittently. After due to dizziness, walking instability for a month, on July 27, 1985 into the Department of Neurology, Huashan Hospital, EEG found that the basic activity slowed down. Suspected of sodium phenytoin poisoning, and then take blood to measure the concentration of sodium, the concentration of sodium benzoate in serum up to 85μg / ml, then follow the medical history, the original patients since 1985