A 24-year-old man comes to the physician for a 2-day history of dry cough. Temperature is 100.9 F. A chest x-ray shows bilateral interstitial infiltrates. Hemoglobin is 11 g/dL. He has no past medical history. Administration of which of the following pharmacologic agents is most appropriate for this patient?
Amoxicillin
Azithromycin
Ceftriaxone
Dicloxacillin
Levofloxacin
