苯妥因钠中毒致共济失调３例郭亚萍，周宗仁例１女，１９岁．２年来反复发作性意识丧失．四肢抽搐，诊断为“癫痫大发作”服苯妥因钠０．３ｇ／日．１年后发作次数减少，自行减药．入院前半月因癫痫发作，加大剂量为每日服苯妥因钠１．２ｇ，服药第１０日，感头昏，乏力，... Phenytoin sodium poisoning caused ataxia in 3 cases Guo Yaping, Zhou Zongren cases 1 female, 19 years old. Repeated episodes of 2 years of loss of consciousness. Twitching limbs, diagnosed as “epileptic seizures” serving sodium phenytoin 0.3g / day. One year after the seizures decreased, reduce their own medication. Half a month before admission because of seizures, increase the dose of daily serving of sodium phenytoin 1.2g, medication on the 10th, feeling dizzy, fatigue, ...