webmd.com Medical Marijuana Treatment Uses and How It Works - WebMD Crohn's disease, cannabidiol and tetrahydrocannabinol webmd.com can help make those natural chemicals work better Webmd.com Pain Management Health and Medical Marijuana host of ailments reasonable medical uses for medical marijuana approved by the FDA according to WebMD. WebMD: Medical Marijuana Medical Marijuana Treatment special authorization card Medical Marijuana medical therapies Pain Management Health and Medical Marijuana prescribed cannabidiol and tetrahydrocannabinol Pain Management Health and Medical Marijuana