No substance on earth is as hotly debated as marijuana. Opponents claim it’s dangerous, addictive, carcinogenic, and a gateway to serious drug abuse. Conversely, fans claim it as a wonder drug, treating cancer, anorexia, AIDS, chronic pain, glaucoma, arthritis, migraines, PTSD, and insomnia. In Stoned: A Doctor's Case for Medical Marijuana, palliative care physician Dr. David Casarett investigates with researchers, doctors, and patients around the globe how marijuana works—and doesn’t—in the real world. Dr. John Russell hosts a discussion with Dr. Cararett on this fascinating work.