A 4-year-old boy is brought to the physician by his mother because of a fever of 38.3ºC (101ºF), rash, and urticaria. His mother states that he has been complaining that his "bones hurt." He has a recent history of an upper respiratory tract infection, for which he completed a 10-day course of cefaclor. Which of the following is the most appropriate therapy for this patient’s condition?
A. Aspirin and diphenhydramine
B. Erythromycin and diphenhydramine
C. Intravenous penicillin and diphenhydramine
D. Oral prednisone and diphenhydramine
E. Topical betamethasone
A. Aspirin and diphenhydramine
B. Erythromycin and diphenhydramine
C. Intravenous penicillin and diphenhydramine
D. Oral prednisone and diphenhydramine
E. Topical betamethasone