Medical cannabis, or medicinal marijuana, can refer to using cannabis and its cannabinoids to treat disease or improve symptoms; however, there is no single decided definition. The use of cannabis like a medicine is not rigorously scientifically tested, often due to production restrictions and other governmental regulations.There's limited evidence suggesting cannabis can be used to reduce vomiting and nausea during chemotherapy, to improve appetite in individuals with HIV/AIDS, and also to treat chronic pain and fits. Its use for other medical applications, however, is insufficient for conclusions about safety or efficacy.
Short-term use increases the chance of both major and minor adverse effects. Common negative effects include dizziness, feeling tired, vomiting, and hallucinations. Long-term effects of cannabis are not clear. Concerns include memory and cognition problems, chance of addiction, schizophrenia in young people, and the chance of children taking it by accident.