• R G dos Santos, J E C Hallak, J P Leite, A W Zuardi, and J A S Crippa.
• Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.
• J Clin Pharm Ther. 2015 Apr 1; 40 (2): 135-43.

What Is Known And ObjectiveAntiepileptic drugs often produce serious adverse effects, and many patients do not respond to them properly. Phytocannabinoids produce anticonvulsant effects in preclinical and preliminary human studies, and appear to produce fewer adverse effects than available antiepileptic drugs. The present review summarizes studies on the anticonvulsant properties of phytocannabinoids.MethodsLiterature search using the PubMed database to identify studies on phytocannabinoids and epilepsy.Results And DiscussionPreclinical studies suggest that phytocannabinoids, especially cannabidiol and cannabidivarin, have potent anticonvulsant effects which are mediated by the endocannabinoid system. Human studies are limited in number and quality, but suggest that cannabidiol has anticonvulsant effects in adult and infantile epilepsy and is well tolerated after prolonged administration.What Is New And ConclusionPhytocannabinoids produce anticonvulsant effects through the endocannabinoid system, with few adverse effects. Cannabidiol and cannabidivarin should be tested in randomized, controlled clinical trials, especially in infantile epileptic syndromes.© 2014 John Wiley & Sons Ltd.

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