trichomoniasis
"Was put on Flagyl 500mg twice a day for one week. Tomorrow morning is my last pill. Had no clue about this antibiotic. 1st pill was taken on an empty stomach and I put the pill on the front of my tongue....big mistake!  Was very aware after that what I had to do...place pill as far back as you can and drink water, fruit punch as fast as you can, on a full stomach!  I constantly feel like I'm car sick, off and on headaches, some anxiety and just an overall disconnected feeling. But.....I have to admit it really works!"