Metronidazole
"I took metronidazole for a BV. It worked right away however my first symptom was metallic taste. Soon my appetite was decreasing. Day 6 I felt extreme nauseous. I have one more to take. I've never had horrible experiences swallowing pills except now. Day 7 and I'm still miserable with being nauseous to the point where I can't get up and do simple daily things. I hope I do not get this again because although the medicine works wonders, the symptoms have been horrible."