What are the known benefits of medical cannabis?

There is moderate to substantial evidence of the potential therapeutic uses for medical cannabis or its component chemicals (cannabinoids) in treating various symptoms such as chronic pain, HIV/AIDS-associated weight loss, nausea/vomiting associated with cancer chemotherapy, and spasticity with multiple sclerosis.

National Academic of Sciences. An Evidence Review and Research Agenda. The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research. 2017