bacterial infection
"I had a bacterial infection and feeling ill, and the doctor prescribed Bactrim. I didn't think it was helping as my illness took a turn for the worst. I had fever, chills, muscle weakness and pain, stomach pain, and I couldn't get out of bed. I'd start to feel better after a few hours and thought it was finally working. Nope. I took my next dose of Bactrim and all the symptoms came back full strength and I was severely ill again. I finally linked it to Bactrim and stopped taking it. My symptoms cleared up over the course of a few days. I learned my grandmother and mother have a severe sulfa allergy, and I found out the hard way I do too. Words just don't describe how sick I was on this medication."