Xifaxan is the antibiotic of choice for SIBO as far as I know. You don't necessarily need to be on it forever, the idea is that having bacterial overgrowth is a positive feedback loop, having too much bacteria lets the bacteria continue reproducing and being overactive in your gut... if you can wipe out the overpopulation with a course of Xifaxan and sort of "reset" to "normal" microbiota then the SIBO won't recur unless you have an ongoing issue causing the overgrowth (e.g. backwash ileitis... but without a colon you're good there :)) Anyway that's my understanding. Either way Xifaxan is barely absorbed systemically so it's one of the safest for longterm use.
Good luck with your ileoscopy! So glad you are getting the care you need finally
dx'ed UC pancolitis 5/12
past meds: asacol hd, VSL#3, apriso, rowasa, xifaxan, 6mp, cortifoam, pentasa, cimzia, canasa, butyrate, flagyl, cipro, prednisone, remicade, methotrexate, cholestyramine, cortenema
current meds: butyrate
step one: colectomy, end ileo 1/16/13
step two: j-pouch construction, loop ileo 5/1/13