I was giving sulfamethoxazole for a UTI on Thursday night 6/25/09. on the 3rd day using this med. i started getting headaches and stomach pains. On Sat. July 4th i work up with 102 fever and red bumps all over my body. went to the er and i still had the UTI, not now i has a bad rash all over my body and i can't even go back to work until it clears up.