Allergy Antibiotic Infection Penicillin Sinus Sinus Infection Antibiotic Penicillin Allergy Sinus infection Antibiotic Penicillin allergy YoshiehtyuiFurman Tuesday, May 2, 2017 How is a sinus infection treated? Webmd answers. For sinusitis caused by virus infection, no antibiotic treatment is how is a sinus infectio...