Both cannabis extract and THC showed significant reductions in urge incontinence.
Link: The Effect Of Cannabis On Urge Incontinence In Patients With Multiple Sclerosis: A Multicentre, Randomised Placebo-controlled Trial (CAMS-LUTS)
Year: 2006
DOI: 10.1007/s00192-006-0086-x
Demonstrable efficacy of cannabis for treatment of Multiple Sclerosis (MS) according to the results found in this study.
Cannabis extract, THC, or placebo