苯妥英轻度过量可引起可逆性小脑症状,(眼球震颤、复视、构音障碍和共济失调)。有人报道,癫痫病人长期服用苯妥英偶可出现不可逆性因小脑萎缩而致脑机能障碍。亦有报道轻而短暂的中毒能引起小脑变性。作者观察了1例试图自杀而服用大量苯妥英致严重中毒的患者,表现为小脑机能障碍和 Mild excess of phenytoin can cause reversible cerebellar symptoms, (nystagmus, diplopia, dysarthria and ataxia). It was reported that patients with epilepsy phenytoin can even be irreversible due to cerebellar atrophy caused by cerebral dysfunction. It has also been reported that mild and transient poisoning can cause cerebellar degeneration. The authors looked at one patient who attempted to commit suicide while taking a large amount of phenytoin-induced severe poisoning, showing cerebellar dysfunction and