Dronabinol has also been found to help improve food intake and prevent weight loss in patients with HIV. In studies of cancer patients, though, it wasn’t better than placebo or another drug (megestrol acetate).

Studies also suggest certain cannabinoids may slow growth and reduce spread of some forms of cancer.

Nabiximols has shown promise for helping people with cancer pain that’s unrelieved by strong pain medicines, but it hasn’t been found to be helpful in every study done. Research is still being done on this drug.

Cannabinoids for various chronic pain

About 17,000 people with cancer, 70 percent reportedly experienced an improvement in pain and general well-being after marijuana use.