So maybe your problem was more reflux than SIBO? I had a massive bowel obstruction and had an emergency right hemicolectomy 2 1/2 years ago which includes removal of 18" of my colon cecum, illeocecal valve, appendix . I developed chronic SIBO and have not been able to get off Xifaxan for any length of time so I am on it daily. I also take Align daily. My dr told me to take a trial off Align and my intestines were a wreck after 4 days. Went back on it and within a few days was fine. Go figure! I think a lot is trial and error.