Twenty-three states have legalized medical marijuana, and some patients who use it say it's effective in treating chronic pain, arthritis, epilepsy, PTSD, cancer and other illnesses. But marijuana is a federally controlled substance. That makes it difficult for researchers to test its efficacy and for patients to decide about treatment. We discuss the science and politics of medical cannabis research.
Is Marijuana Effective Medicine?
Timmen Cermak, psychiatrist and past president of the California Society of Addiction Medicine
Tamar Todd, director of marijuana law and policy at the Drug Policy Alliance
Suzanne Sisley, assistant professor of internal medicine/psychiatry at the University of Arizona College of Medicine
Igor Grant, professor and chair of the Department of Psychiatry at the UC San Diego School of Medicine and director of UC's Center for Medicinal Cannabis Research