Sulfamethoxazole / trimethoprim
"This antibiotic cleared up my urinary tract infecton within 24 hours. The morning after I took it I didn't need to go to the bathroom frequently and had no pain. So that was great. However I am definitely NOT loving the horrible nausea I am experiencing from it, I just feel like I want to vomit. I have never taken an antibiotic in my life before this and I didn't know it would cause side effects."