"We observe significant improvement of symptoms of FM [fibromyalgia] in patients using cannabis in this study although there was a variability of patterns. This information, together with evidence of clinical trials and emerging knowledge of the endocannabinoid system and the role of the stress system in the pathopysiology of FM suggest a new approach to the suffering of these patients. The present results together with previous evidence seem to confirm the beneficial effects of cannabinoids on FM symptoms."

Source

Fiz, Jimena; Dura´n, Marta; Capella, Dolors; Carbonel, Jordi; Farre, Mag?, "Cannabis Use in Patients with Fibromyalgia: Effect on Symptoms Relief and Health-Related Quality of Life," PLoS Medicine (Cambridge, United Kingdom: Public Library of Science, April 2011) Vol. 6, Issue 4, p. 4.
http://www.ncbi.nlm.nih.gov/p…