Muscle Tension and Spasm
Another effect of medical cannabis is the ability to relax muscle tension. In a 2004 study by the American Cancer Society, people with multiple sclerosis (MS) who used cannabis - in a liquid extract form containing THC and cannabidiol - experienced a decrease in muscle spasms and shaking [source: American Cancer Society].
In studies performed on severely disabled MS patients, an intake of THC produced a decrease in tremors and muscle stiffness [source: National Multiple Sclerosis Society]. All eight patients reported a "high" with two experiencing discomfort and slight paranoia.