What Should I KnowAboutMedical Cannabis ? Michael A. Incze, MD, MSEd; Deepika Slawek, MD,MS, MPH; Chinazo O. Cunningham, MD,MS The JAMA Internal Medicine Patient Page, Online : February 11, 2020 doi : 10.1001/jamainternmed.2020.0018   What Is Cannabis and How Is It Used ? • Cannabis (ie, marijuana) is a plant that contains a complex mixture of chemicals called cannabinoids. Examples of cannabinoids include tetrahydrocannabinol (THC) and cannabidiol (CBD). • Whereas THC is primarily responsible for the psychoactive effects (euphoria) of cannabis, CBD may decrease pain but causes far fewer psychoactive effects than THC. • Cannabis is used medically as purified cannabinoids (eg, CBD), synthetic cannabinoids (eg, dronabinol), or [...]