200 mg po bid.
Important side effects
Even though not absorbed, it can still cause a hypersensitivity reaction (PubMed).
Rants and Screeds
Currently (Dec 2011) a course is around three thousand dollars. Really. $3,000. Can you say price gouge?
Treatment of choice
C. difficile diarrhea. Equal cure rates to vancomycin, fewer relapses (PubMed). It is cidal and has a prolonged post antibiotic effect; the first is probably unimportant, the second probably not so much much.
Don't use for
Macrocyclic antibiotic; inhibits the bacterial RNA polymerase,