Here is some reading and background information concerning IBS/Ulcerative Colitis and medical marijuana. Please note some of these may not be the latest information but are included to offer a wide range of sources and opinions, they do not constitute medical advice, and in almost every case more research is needed before there is certainty.
Crohn’s / Colitis FoundationFoundation Position Statement: Medical cannabis
Cannabis for the treatment of ulcerative colitis
Cannabis and cannabis oil for the treatment of ulcerative colitis
How Medicinal Marijuana Helps My UC