• Stephen E Nicolson, Lex Denysenko, J Loretta Mulcare, Jose P Vito, and Brenda Chabon.
• Albert Einstein College of Medicine, Montefiore Medical Center, Department of Psychiatry and Behavioral Sciences, Bronx, New York 10467, USA. snicolso@montefiore.org
• Psychosomatics. 2012 May 1;53(3):212-9.

BackgroundCannabis is the most commonly used illicit substance worldwide. Cannabinoids or cannabinoid receptor agonists are often used to treat nausea, vomiting, and anorexia. However, in recent years, several medical journals have published reports of patients with nausea and vomiting thought to be induced by chronic cannabis use.ObjectiveThe authors seek to inform readers about Cannabinoid Hyperemesis Syndrome (CHS).MethodThe authors describe four patients with chronic cannabis abuse, episodic, intractable nausea and vomiting, and compulsive hot water bathing. Previous cases of CHS are reviewed, pathophysiology is hypothesized, and difficulties with making the diagnosis are discussed.ConclusionCHS should be strongly considered in the differential diagnosis of patients with intractable vomiting and/or compulsive hot water bathing.Copyright © 2012 The Academy of Psychosomatic Medicine. Published by Elsevier Inc. All rights reserved.

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