What are the medical health benefits of cannabis?

There are few subjects that can elicit stronger emotions than medical and therapeutic cannabis. And especially among doctors, scientists, researchers, policy makers and the public Should this be legal? Decriminalized? Has its effectiveness been proven? Under what conditions is it useful? Is it addicting? How do we keep this out of the hands of teenagers? Is this really the “wonder drug” that people claim to be? Is medical marijuana just a ploy to legalize weed in general? The answers in the Health section.