Alternatives to rifaximin include amoxicillin/clavulanic acid in combination with metronidazole.
Two measures she routinely recommends to forestall recurrent SIBO are to have patients start probiotics after a course of rifaximin, and also to try the low-FODMAP (fermentable oligo-di-monosaccharides and polyols) diet. The evidence base in SIBO is weak, but the anecdotal experience has been strongly positive.
“These are two interventions you can provide to your patients with a lot of bloating and gas. It’ll make them feel much, much better,” the gastroenterologist said.
FODMAPs are short-chain carbohydrates, and the low-FODMAP diet is an elimination diet. The first 6 weeks are highly restrictive, then the foods on the high FODMAP list are reintroduced one at a time until the offenders are identified. The low-FODMAP diet hasn’t been conclusively proven effective for SIBO in a randomized clinical trial, but it does have a compelling evidence base for treatment of irritable bowel syndrome diarrhea (J Gastroenterol Hepatol. 2010 Feb;25[2]:252-8).