I've never been on other meds....but that's disgusting to hear of your BIL's treatment.
He can get his GP to send him to another doctor....where is he?
He lives in the Vancouver area. I think you are right. He needs to speak to his G.P. about
finding another Gastro, even if he has to wait a while. There is too much at stake for him, because some of the damage from Crohn's can't be undone, and who wants endless surgeries and an ever shrinking small intestine?
EDIT: Any Vancouverites here who have a competent and compassionate GI Doc? I could pass the name along to him.