CBD has a wide range of medical benefits. CBD non-psychoactive.

Charlotte Figi who was born with Dravet Syndrome, a severe form of intractable epilepsy. Intractable means the seizures are not controlled by medication. CBD has reduced her seizure frequency from roughly 400 a week, to almost zero.

Pharmacies in the United Kingdom make CBD available as an oral mucosal spray available for relief from conditions associated with multiple sclerosis. 

GW Pharmaceuticals  produces a drug called Epidiolex. The drug contains 98% CBD, no THC, and has been approved by the U.S. Food and Drug Administration for trials on children with certain forms of epilepsy. Conveniently, CBD was just listed as a Schedule 1 substance, making it illegal to obtain naturally shortly after FDA approved Epidiolex.