I was prescribed Avelox for a sinus infection yesterday. Within...

I was prescribed Avelox for a sinus infection yesterday. Within 1 hour of taking the first dose, I experienced a bad reaction: My entire body turned very red, my entire digestive system felt as if someone were crushing my insides with a vice, and I had trouble breathing. I called 911, got the Emergency Squad to my home, and they got me started on some benadryl and took me to the ER. I also nearly passed out from the pain, and I've never passed out in my life.