Metronidazole
"I've been on this prescription 4 times this year. I caught c-diff after having a vulvectomy and then the next day emergency gallbladder surgery.  So I had it for three separate 14 day rounds to get rid of that, (cdiff much harder to get rid of then bv) now a month later doctors told me I have a bv. So on a 7 day round. The taste is God awful! I get head aches, dry mouth consently thirsty, bloading/gas and yeast infections. But after being on it 3 days the symptoms of the bv are definitely starting to subside. Good luck ladies!!"