Policy Ahead of the Science: Medical Cannabis Laws Versus Scientific Evidence.

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.

Harm Reduction: Not Dirty Words Any More.

Although many of the tenets of harm reduction have been around for centuries and more traditional harm reduction services such as syringe services programs have been in existence for decades, there has been a recent increase in interest and acceptance of harm reduction as an essential component of a public health approach to substance use. This article provides an overview of harm reduction and its application to alcohol, tobacco, and drug use. It discusses the importance of integrating harm reduction principles and services with traditional psychiatric, medical, and addiction treatment programs.