Marijuana has several potential medical benefits according to the document. It may help treat cancer by slowing tumor growth, seizures by acting as a muscle relaxant, and migraines as reported in California. Marijuana has also been shown to treat glaucoma, Tourette's syndrome, OCD, multiple sclerosis, and Alzheimer's. Additionally, it may help conditions like IBS, Crohn's disease, ADD, ADHD, and PMS symptoms. The document argues that marijuana provides medical benefits without negative side effects of pharmaceutical treatments in many cases.