The researchers reported that tetrahydrocannabinol had double the rate of muscle stiffness relief compared to the placebo at the end of the 12-week period.15.7% of those on placebo experienced relief from muscle stiffness, compared to 29.4% on the cannabis extract.
There was a clear difference between the effectiveness of the cannabis extract over placebo after 4 and 8 weeks. Tetrahydrocannabinol was clearly superior to the placebo in relieving pain, improving sleep quality, and reducing the symptoms of muscle spasms at all points during the trial, the researchers added.