• Radu Tanasescu and Cris S Constantinescu.
• University of Nottingham, Academic Division of Clinical Neurology, Queen's Medical Centre, Nottingham, UK. b
• Expert Opin Drug Metab Toxicol. 2013 Sep 1;9(9):1219-28.

IntroductionPain associated with multiple sclerosis (MS) is frequent, and frequently not alleviated by currently available drugs. Nabiximols is a combination of two plant cannabinoids administered via an oromucosal pump spray and approved in Canada for the treatment of intractable central neuropathic pain due to MS and intractable cancer pain. Nabiximols exerts its analgesic effects through its interaction with the endocannabinoid system to modulate pain transmission via pain networks.Areas CoveredThis review examines the characteristics of nabiximols, its pharmacokinetic properties and data on efficacy and tolerability in MS-related neuropathic pain. The authors, furthermore, provide information on the pharmacology and clinical data of nabiximols as neuropathic analgesic in MS.Expert OpinionNabiximols is an appropriate therapy for pain patients who tend to be particularly resistant to pharmacological interventions. Its action depends on not only the local constellation of the endocannabinoid system signalling, but also the particular functional status of pain pathways and on the specific mechanism of neuropathic pain. It is therefore justifiable that further studies are initiated which aim to define the best responder profile and which explore the full potential of nabiximols in MS-related pain.

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