Metronidazole
"Taking this medication for 10 days for C diff. I am on day seven right now, and it's been horrible. 41-year-old, female, had bloody and mucus and bad diarrhea. I think medicines have fixed the diarrhea and bloody mucus for now, but I am so dizzy. I feel even sicker in other ways. It's causing me major shortness of breath, fatigue, nausea, confusion. Found out the hard way that even putting lotion on my face or body that have any alcohol in them will make you feel even worse on this medication."