urinary tract infection
"I'm usually skeptical about these posts and the crazy side effects, so I didn't take them seriously when I was prescribed this medication. I only took 3 doses, and although my symptoms are gone, I had the worst splitting headache I've ever had, intense nausea and foggy brain/not feeling myself. I skipped my 4th dose and felt completely better within a few hours. I felt worse on this medication than I ever did with a UTI."