Medical marijuana is the use of cannabis to treat chronic pain, nausea, anxiety, sleep apnea and other conditions. Officially the use of cannabis as a medicine has not been rigorously tested due to production restrictions and other governmental regulations. Limited evidence suggests cannabis can reduce nausea and vomiting during chemotherapy, improve appetite in people with HIV/AIDS, and reduce chronic pain and muscle spasms. That being said many people find it helps with a number of issues and new research is being done to investigate its further medical use. When used medically, marijuana can be consumed via smoking, vaporizing, eating extracts or using topicals like lotions or sprays.