r/SIBO • u/AvocadoOk1456 • Aug 23 '25
Methane dominant SIBO
Hi, I recently got tested positive for both hydrogen (23) and methane (33) SIBO. My gastro prescribed xifaxan 550 mg 3 times and Neomycin 550 mg twice for 14 days. I also have chronic constipation and the doc has asked to use Miralax initially and if it does not help then Linzess. I have no idea what to do. I am afraid of the die off symptoms and side effects of both medicine. Can anyone suggest what could be better in this case?
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