Sulfamethoxazole / trimethoprim
"I used to get recurrent urinary tract infections but hadn't had one in 7 years. Just got one and they tried nitrofurantonin but it did nothing. I got Bactrim and the urgency and burning was gone within hours. I don't like taking antibiotics but UTIs are no joke. Bactrim worked for me and thank goodness. I get a little stomach ache but it beats the UTI symptoms!"