NIDA International Program Director Steven W. Gust, Ph.D., organized and co-chaired a symposium titled “Marijuana, Addiction Physicians, and Public Policy” at the International Society of Addiction Medicine (ISAM) meeting. Speakers included Jag H. Khalsa, Ph.D., NIDA Division of Pharmacotherapies and Medical Consequences of Drug Abuse, who reported on NIDA research into treatment medications, and Vladimir Poznyak, M.D., Ph.D., World Health Organization, who reported on global epidemiology of cannabis use and implications for public health. NIDA grantee Margaret Haney, Ph.D., Columbia University School of Medicine, presented the latest data on cannabinoid formulations, routes of administration, and treatment. Two speakers described the policy issues for addiction physicians in the United States: Stuart Gitlow, M.D., M.P.H., M.B.A., president of the American Society of Addiction Medicine, and Norman Wetterau, M.D., Tricounty Family Medicine and the University of Rochester, NY, School of Medicine. Gregory Bunt, M.D., Daytop Village, co-chaired the symposium. NIDA supported Dr. Haney’s travel for the symposium. The meeting attracted more than 445 participants from 43 countries. It was held October 2–6, 2014, in Yokohama, Japan.