Sibo positive. first few days on flagyl symptoms reduced. no gas less abdominal distension. symptoms returned while still on 2 week flagyl course. why?

Talk with doctors...: Although antibiotic use may help, there is no guaranty. Furthermore, doctors have never cures anything, but modify something for someone at some degree with / without drug and/ or surgery at reasonable time in reasonable way to reasonable patients. So, report & talk with treating doctor. More on SIBO? Go to https://en.wikipedia.org/wiki/Small_intestinal_bacterial_overgrowth. Best wishes to...

Consider change Rx: Flagyl(metronidazole) is no longer recommended to be used alone for treatment. Recommended single agent regimens: Rifamaxin is best but expensive. Amoxicillin-clavulenate. Recommended combination regimens: Flagyl with a cephalosporin(e.g. Keflex) or Flagyl with Bactrim( trimethoprim-sulfamethoxazole, also called co-trimoxazole) **all regimens given for 7-10 days initally.