Cannabis oil to treat mitochondrial disease

Dr. Fran Kendall gives the answers to these questions and more regarding the use of medical marijuana (cannabis oil) for treatment in mitochondrial disease patients.What is the historical use of marijuana for medical purposes? Are there legalities associated with medical marijuana use? When is medical cannabis a potential therapeutic option for patients with mitochondrial disease?  Are there guidelines on dosing and use? Is it true that medical cannabis is for pain and seizures only? Is marijuana addictive, even when used for medical purposes? Have there ever been safety studies published about use of marijuana for medical purposes?