A case report of cimetidine-induced clozapine toxicity.

Abstract

Cimetidine may decrease concomitant medication clearance by inhibiting the oxidative system of cytochrome P-450. The authors report increased serum clozapine levels and adverse side effects during clozapine and cimetidine treatment but not during clozapine and ranitidine treatment in a patient with chronic paranoid schizophrenia.