What Do I Need to Know about Marijuana?

Ryan G. Vandrey, PhD, is associate professor of psychiatry and behavioral sciences at Johns Hopkins School of Medicine. His research focuses on the behavioral pharmacology of marijuana in adult research volunteers, clinical trials, web-based survey research, and patients using marijuana or cannabinoids for therapeutic purposes. Key Points Endocannabinoid system in our brain Acute effects, chronic effects Tolerance, withdrawal Treatment of mj use disorders Marijuana may change adolescent brain structure Researchers CAN obtain mj people are using today Difference between potency and dose Cannot trust labels Next Up? Dr. Kuhar on How Marijuana Works in the Brain