Marijuana reduces the symptoms of various conditions, including nausea and resulting weight loss caused by HIV/AIDS. It can also help with the side effects, including nausea, caused by other medications and chemotherapy during the treatment of cancer or hepatitis C. https://www.mpp.org/issues/medical-marijuana/medical-marijuana-overview/
Medical marijuana helps alleviate muscle spasms caused my multiple sclerosis. It can also be effective in treating seizure disorders and chron's disease symptoms. Marijuana helps the natural chemicals that effect inflammation, pain, and other areas to be more effective. http://www.webmd.com/pain-management/features/medical-marijuana-uses