Illicit Cannabis Use Increased More in States with Medical Marijuana Laws

Deborah S. Hasin, PhD, of the Department of Psychiatry and the Mailman School of Public Health at Columbia University Medical Center, and colleagues, published new research in the April 26, 2017 issue of JAMA Psychiatry: “US Adult Illicit Cannabis Use, Cannabis Use Disorder, and Medical Marijuana Laws:1991-1992 to 2012-2013."  Results from the study indicate that both illicit cannabis use and cannabis use disorders increased significantly in those states that had passed medical marijuana laws…   READ MORE


Mailman School of Public Health, Substance Use