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Review: short-term medical use of cannabis increases risk of non-serious adverse effects

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M A Ware

Dr M A Ware, Montreal General Hospital, Montreal, Quebec, Canada;


Is medical use of cannabis associated with an increased risk of adverse effects?


Studies selected reported adverse events associated with medical use of cannabis for pain or chemotherapy-induced nausea in patients with chronic diseases such as multiple sclerosis, neuropathic pain, or cancer. Outcomes were serious and non-serious adverse events.


Ovid Medline, PsycINFO, and EMBASE/Excerpta Medica (to Oct 2007), and reference lists were searched for randomised controlled trials (RCTs), observational studies, and case reports. 23 RCTs (n = 2087) and 8 observational studies met the selection criteria. …

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  • Source of funding: Canadian Institutes of Health Research.