English

Abstract

Phenytoin is still one of the most commonly used antiepileptic drugs in clinical practice around the globe. It has a range of familiar prejudicious and side effects, which have been reported formerly including ataxia, dizziness, visual disturbance, nystagmus, diplopia and cognitive dysfunctions amongst others. Here we are reporting a rare case of phenytoin toxicity presenting dramatically as a behavioural disorder resulting from underlying primary adverse effects of phenytoin, which were clinically overlooked. Discontinuation of phenytoin resulted in remission of side effects as well as the secondary behavioural manifestations.