Many Ohio doctors find medical marijuana is effective for cancer and pain, but fewer find it effective for sickle cell anemia cleveland.com: Ryan Marino, assistant professor at the School of Medicine, discussed a new study that found most Ohio doctors who prescribe medical marijuana reported they were satisfied with the drug’s effectiveness in treating patients with pain, cancer, fibromyalgia and post-traumatic stress disorder. “It’s not to say that marijuana is inherently safe, because it definitely has risk associated with it, but in terms of people who are trying to treat chronic conditions, it either works or it doesn’t work,” he said. |