Sulfamethoxazole / trimethoprim
"This is definitely my favourite medicine to treat urinary tract infections. I have a longstanding history with UTI's, one even sent me to the ER. The best part about this medicine is that it works quickly and feel relief within the first dose, which is great. I tried nitrofurantin once and absolutely hated it because of side effects & will stick with this. Luckily I've never experienced any negative side effects & I've taken with and without food. No nausea, nothing! It's definitely a hefty sized pill though."