urinary tract infection
"I'm taking Bactrim twice a day for ten days.  I was taking five day course of Cipro and had a migraine headache, which wouldn't go away.  Cipro didn't even help me, I still had white blood cells and blood in my urine which makes for a bad urinary tract infection. The PA gave me Bactrim. I still have a slight headache but the UTI was so bad, I can deal with these side effects.  The pressure in my bladder area has subsided and five more days to go. I can handle Bactrim."