A good probiotic daily is essential for IBSers even when not on any antibiotics...IBSers (along with IBDers) tend to have bacterial over-growth, antibiotics kill EVERYTHING and that leaves your system vulnerable as well...a good probiotic daily is a must.
Primadophilus Reuteri made by natures way is an excellent one, very affective, doesn't contain a bunch of dyes, artificial sweetners (like sugar alcohols), preservatives and such, just a little bit of potatoe starch for preservation...and it's got guaranteed intestinal release, aids with lactose intolerance, vaginal health and high cholesterol...any affordable, only one/day is needed.
:)