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Policy Ahead of the Science: Medical Cannabis Laws Versus Scientific Evidence
Gregory Malik Burnett1, David A Gorelick2, Kevin P Hill3
1Center of Addiction Medicine, University of Maryland Midtown Campus, 827 Linden Avenue 4th Floor, Suite 405, Baltimore MD 21201, USA; Division of Addiction Research and Treatment, Department of Psychiatry, University of Maryland School of Medicine, 22 S. Greene Street S-1-D-04, Baltimore, MD 21201, USA.
Abstract:
Forty-one US jurisdictions (37 states) have legalized comprehensive medical cannabis programs since 1996. The number of qualifying conditions per jurisdiction varies from 5 to 29. Five (12%) of 42 qualifying conditions have conclusive or substantial evidence of efficacy and are listed in more than half of all jurisdictions. Half (50%) of qualifying conditions have no or insufficient scientific evidence of benefit from medical cannabis; 9% of qualifying conditions have limited evidence of harm from medical cannabis. The mean number of qualifying conditions per jurisdiction and the proportion of conditions with and without evidence of benefit have not changed since 1996.
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