My husband had C-Diff after
antibiotics for
pneumonia. Flagyl helped within 48hrs, but then a week later, he relapsed. This is rare, from what I read. My husband happens to be the lucky one. Once he relapsed, they put him on vancomycin, which is a somewhat dangerous antibiotic (as far as side effects). However, the vancomycin kicked it in about 24-48 hrs for good.
I can safely tell you -get some probiotics from the health food store, or it can be prescribed from your doc.