Since marijuana became legal in many US states, people of all ages are using it for pain relief and treatment of a variety of illnesses and ailments. But is it safe? In this comprehensive book, renowned psychiatrist and licensed prescriber of medical marijuana Dr. Rebecca Siegel delivers the most complete guide yet about the benefits and risks of using marijuana today. Based on the latest scientific research, this easy-to-read book busts all the myths and helps you navigate the sometimes confusing and often-changing world of marijuana.