“Smoking marijuana may improve some symptoms of multiple sclerosis, a new study suggests.

Patients with multiple sclerosis in the study had less muscle tightness, also called spasticity, and less pain after they smoked marijuana, compared with after they took a placebo…

More research is needed to confirm the findings and to investigate whether lower doses of marijuana may have similar benefits with fewer adverse effects, said study researcher Dr. Jody Corey-Bloom, professor of neurosciences and director of the Multiple Sclerosis Center at the University of California, San Diego.

The study is published today (May 14) in the Canadian Medical Association Journal.

Improved symptoms

Previous studies have suggested marijuana use may have benefits for MS patients, but most have investigated oral forms of the drug, including mouth sprays and capsules. In addition, most studies have asked patients to report changes in their symptoms, rather than having a researcher objectively assess them…

Participants were randomly assigned to receive treatment with a marijuana cigarette or a placebo cigarette, which did not contain delta-9-tetrahydrocannabinol (THC), the active ingredient of marijuana. Participants smoked a marijuana cigarette once a day for three consecutive days under the supervision of a researcher. Eleven days later, participants repeated the procedure, but this time, they switched treatment groups so that everyone received the marijuana cigarette and placebo at some point in the study. On average, participants smoked four puffs of their cigarettes at each session.

Shortly after each treatment session, the researchers assessed participants with a test specifically designed to measure spasticity.

After smoking marijuana, participants experienced a 30 percent reduction in spasticity, compared with when they smoked the placebo cigarette, Corey-Bloom said.”

More: http://www.nbcnews.com/health/pot-smoking-may-help-relieve-symptoms-ms-771076