Clin Psychopharmacol Neurosci 2018; 16(4): 505-507  
Clozapine-related Sudden Pericarditis in a Patient Taking Long Acting Aripiprazole and Valproate: A Case Report
Domenico De Berardis1,2, Michele Fornaro3,4, Laura Orsolini3,5,6, Luigi Olivieri1, Francesco Nappi1, Gabriella Rapini1, Federica Vellante1,2, Cosimo Napoletano7, Nicola Serroni1, Massimo Di Giannantonio2
1National Health Service, Department of Mental Health, Psychiatric Service of Diagnosis and Treatment, Hospital “G. Mazzini”, Teramo, 2Department of Neurosciences and Imaging, University “G. d’Annunzio”, Chieti, 3Polyedra Research Group, Teramo, Italy, 4New York Psychiatric Institute, Columbia University, New York, NY, USA, 5School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK, 6Department of Psychiatry and Neuropsychology, University of Maastricht, Maastricht, The Netherlands, 7Department of Cardiovascular, Hospital “G. Mazzini”, Teramo, Italy
Correspondence to: Domenico De Berardis, MD, PhD
National Health Service, Department of Mental Health, Psychiatric Service of Diagnosis and Treatment, Hospital “G. Mazzini”, Piazza Italia 1, 64100 Teramo, Italy
Tel: +39-0861429708, Fax: +39-0861429709
Received: March 27, 2017; Revised: May 2, 2017; Accepted: May 3, 2017; Published online: November 30, 2018.
© The Korean College of Neuropsychopharmacology. All rights reserved.

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Clozapine may be associated with cardiovascular adverse effects including QTc prolongation and, more rarely, with myocarditis and pericarditis. Although rare, these latter cardiovascular adverse effects may be life-threatening and must be immediately recognized and treated. Several cases of clozapine related-pericarditis have been described and often it has a subtle and insidious onset with symptoms that may be often misdiagnosed with psychiatric manifestations (e.g. anxiety, panic or somatization) leading to a delayed correct diagnosis with potential fatal consequences. In the present report we describe the case of a 27-year-old girl with schizoaffective disorder taking long acting aripiprazole and valproate who developed a sudden onset clozapine-related pericarditis during titration phase that resolved with immediate clozapine discontinuation and indomethacin administration. We underline the importance of an early diagnosis of clozapine-related pericarditis and the need to have monitoring protocols to prevent this potentially fatal adverse effect especially when polypharmacy is administered to patients taking clozapine.
Keywords: Clozapine; Pericarditis; Valproic acid; Polypharmacy; Drug monitoring.

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