Thank you for adding this to your side effect. I did not even know what that was until I was just told that I might have it. I have been getting infections but didn't know why. Doc explained the Rectal-bladder fistula and said something about needing a scope and a scrape? Still not sure what that all means but perhaps you do. They want to wait to see if I keep getting infections and if so then they will do the scrape thing (the infections I am getting are UTIs).