Ciprofloxacin
urinary tract infection
"I was prescribed Cipro for a treatment of 7 days, two a day every 12 hours. I'm at the 4th day, I woke feeling extremely sick. I've felt physically ill. I don't even think I can take anymore, I've felt terrible while on this. I just got diarrhea today. I've had back and flank pain, nausea, trouble eating, and a general tired feeling since the day I started. Infection is cleared up though, no urinary tract infection symptoms at all while urinating. 
Side effects are horrible though, I can't even finish them."