bacterial infection
"I had possible Strep throat. First day I took it my fever rose to over 102. I was shaking, chills, rash.  My blood pressure (and I have high blood pressure) was 100/55 and my pulse was 50, I was not feeling well at all. I called doctor next morning and he switched me to Amoxicillin. I hope it works better.  Now I have a under the skin rash all over and am itching.  Guess I am allergic to this one."