Nitrofurantoin
"last year I had gotten a UTI and was first prescribed Bactrim and it didn't help. I went back and was prescribed a 10 day pack of Nitrofurion.. Worst decision of my life was to take the Nitrofurion. By the 9th day I started breaking out in hives, which continued to take over my body for the next several weeks. I then spent the next 9 months going to allergists to help me manage the constant hives. I had developed chronic hives from this medication. It has been a year and the hives have finally subsisted. After all that I still had that UTI

I learned a recipe making tea with Uva Ursi to clear the infection (known for killing Ecoli) and drank marshmallow root tea seeped for 8 hrs in cold water. And it cleared up the infection."