Cannabis Based Medicine (Sativex®) Relieves Spasms And Stiffness In People With Multiple Sclerosis / Medical News Today, 28 February 2007
http://www.medicalnewstoday.com/medicalnews.php?newsid=64005
"The European Journal of Neurology (EJN) reports a study which shows that Sativex, a cannabis based medicine, significantly reduces intractable spasms and stiffness (spasticity) in people with Multiple Sclerosis (MS)."

Randomized controlled trial of cannabis-based medicine in spasticity caused by multiple sclerosis
European Journal of Neurology, Volume 14 Issue 3 Page 290 - March 2007
http://digbig.com/4rqmb
C. Collin, P. Davies, I. K. Mutiboko, S. Ratcliffe [Sub required]