urinary tract infection
"Bactrim was the worst antibiotics I have taken. I was prescribed this medicine for a UTI from a the Dr and I took one pill before I went to bed and felt fine. It was like 4 am it when I got hit with a massive headache from hell. I could not sleep and then about 2 hours later around 6am. I started vomiting until all I could vomit out was my stomach acid. Horrible! That day I still had a bad headache and nauseous all day. I discontinued the pill and flushed them all down the toilet!"