The article you requested is

Clozapine-Induced Pericarditis, Pericardial Tamponade, Polyserositis, and Rash

J Clin Psychiatry 2005;66(11):1491-1492 [letter]

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Sir: Clozapine is an antipsychotic medication introduced to the United States in 1989. It is a tricyclic dibenzodiazepine derivative chemically related to the traditional antipsychotic medication loxapine.1 Side effects pose a significant problem during clozapine therapy.​