Welcome to Crohn's Forum, a support group for people with all forms of IBD. While this community is not a substitute for doctor's advice and we cannot treat or diagnose, we find being able to communicate with others who have IBD is invaluable as we navigate our struggles and celebrate our successes. We invite you to join us.
I asked my GI doc the same question when I was preparing to have carpal tunnel surgery. He sais no, if the other doc was following "normal sterile surgical procedures" it would not be necessary to stop the H. In addition I have had a fistulotomy while on the H with no problems. My blood counts are all in the normal range, and that's with weekly injections.