I did the flagyl & bactrim protocol for H.pylori for an ulcer many years ago. It worked very well and I did not get the ulcer back. I had a simple blood test to determine the h.pylori and then a repeat bld. test after as well. The antiobiotics worked and I converted to negative h.pylori. I have had gastritis over the years which may be due to h.pylori as well but I did not get another ulcer.
beth