@decosmo, Hi Rosie! I realize that this is an older post, but I wanted to interject this info here for future readers. Here are a few brands of probiotics that other members have posted: 'Renew Life' w/30billoion live cultures, 'Floraster' - good to take if your antibiotic is giving you diarrea (Costco $57.00), 'IMD Complete Probiotics' from Amazon (a tad pricey). I also drink lactose free Kefir milk, it has live cultures in it. REMEMBER: take your probiotics at least two hours prior or after your antibiotics.