I have thought about this a bit, as I was at a party on Saturday where someone was suggesting Roaccutane to someone with bad acne, and I said that I believed there to be a link between this and IBD. However, talking to my mum who was a nurse (remembering that neither of us have much info on this though) she wondered which came first. Is the IBD brought on by the drug, or is the acne brought on by the IBD, which then gets treated by the drug? Just a thought, though I would definitely not be keen to be taking Roaccutane!