Sulfamethoxazole / trimethoprim
urinary tract infection
"I was I was prescribed this antibiotic yesterday and within a few hours after taking the first dose I felt like a freezing sensation over my entire body. I started sweating really bad and had a freezing sensation in the middle of my upper back. My temperature dropped from 101.8 to 97.6  I’m really scared to take anymore of it. Also the back of my neck is sore and my head has a tingling sensation."