kidney infections
"Took this medicine for a horrible horrible HORRIBLE kidney infection. Worked within 2 days and cleared up all of my symptoms, which was such a relief. I was told to finish off the bottle by my doctor, and the next day I developed a horrible case if the hives. I stopped taking the medicine immediately, but the hives stuck around for another 3 days. What a miserable week! So, Bactrim worked wonders for my kidney infection, but little did I know I was severely allergic to it. Take with caution."