Sulfamethoxazole / trimethoprim
"I've taken this to treat and to prevent urinary tract infections and it has helped me with both. The only reason I gave it an 8 is because if I don't take it for a while and then I take it, I get hives. The next day when I take it I'm fine. Just happens the first time. When this happens I have to take a allergy medicine to help it go away."