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      The psychiatric side-effects of rimonabant.

      Revista brasileira de psiquiatria (São Paulo, Brazil : 1999)

      Anxiety Disorders, methods, Smoking Cessation, drug therapy, Smoking, physiology, antagonists & inhibitors, Receptor, Cannabinoid, CB1, Randomized Controlled Trials as Topic, adverse effects, Pyrazoles, Placebo Effect, Piperidines, Obesity, Metabolic Diseases, Humans, chemically induced, Depressive Disorder, Cannabinoid Receptor Modulators, Appetite Depressants

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          Abstract

          Experimental evidence has suggested that drugs that enhance cannabinoid type-1 (CB1) receptor activity may induce anxiolytic and antidepressant effects, whilst the opposite has been reported with antagonists. Thus, the objective of the present review is to discuss the potential psychiatric side-effects of CB1 receptor antagonists, such as rimonabant, which has been recently marketed in several countries for the treatment of smoking cessation, obesity and associated metabolic disorders. Literature searches were performed in PubMed and SciELO databases up to February 2009. The terms searched were 'obesity', 'rimonabant', 'cannabinoids', 'unwanted effects', 'diabetes', 'smoking cessation' and 'side-effects'. Clinical trials have revealed that rimonabant may promote weight loss in obese patients, although it may also induce symptoms of anxiety and depression. Patients taking CB1 receptor antagonists should be carefully investigated for psychiatric side-effects. These drugs should not be prescribed for those already suffering from mental disorders. Nevertheless, the development of new compounds targeting the endocannabinoid system for the treatment of several conditions would be necessary and opportune.

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