I always thought I was allergic to penicillin, since I had a rash and "slapped face" after taking amoxicillin and levaquin about 10 years. Last summer, I had the allergy skin tests by an allergist, and it was determined that I am not allergic to penicillin.
Now I was prescribed Augmentin for a sinus infection and I've taken it twice a day for 4 days. My upper arms are itching, but no visible rash. Should I be concerned? stop taking it? Call my doctor?