Hi, I'm currently on day 6 of vancomycin. I got c-diff from taking clindamycin about 4 weeks earlier. I've been taking 2 tablets of Florastor twice a day, and one capsule of BIO-K+ once a day . I take the Florastor with my first and last vancomycin dose of the day. ( Florastor is a yeast and the antibiotics don't hinder it. ) I take the BIO-K+ probiotic mid day : I time my dose to be atleast 2 hours before and after a vancomycin dose otherwise the vancomycin will kill the probiotics. I'll continue this dosing for atleast a month after my 10 days of vancomycin is complete. From all my reading it seems that these two probiotics are the most research backed i could find. Thats why I take them. I have found the ignorance of the medical personelle to be unconscionable . Their ignorance and lack of guidance and true health care about diet ( what actually heals, what hurts), cleaning protocols so I don't reinfect myself or infect others, and probiotics is appalling. I know these are strong adjectives, but honestly to me: not strong enough. Good Luck and a Big Hug to everyone who reads this because if you've been battling c-diff i know you could use one!!!