Marijuana may ease painful symptoms of multiple sclerosis, a study published in the Canadian Medical Association Journal in May suggests.
Jody Corey-Bloom studied 30 multiple sclerosis patients with painful contractions in their muscles. These patients didn't respond to other treatments, but after smoking marijuana for a few days they were in less pain.
The THC in the pot binds to receptors in the nerves and muscles to relieve pain. Other studies suggest that the chemical also helps control the muscle spasms.