Re: rash after taking medicine
If you have stopped the medication, it shouldn't get worse. If it does or you have any breathing problems, go see your doctor. Benedryl is a good choice for treatment.
Also talk to your doctor about your reaction. You should add this medication to the list of medication allergies. You may also need to talk to him about another medication for treatment of your infection.
I had a similar reaction with Sulfa years ago.