A 45-year-old previously healthy man presents with fever, cough productive of purulent sputum, and pleuritic chest pain. A chest X-ray shows a lobar infiltrate. He has no significant comorbidities and has not been on antibiotics recently. Which of the following is the most appropriate empiric antibiotic regimen for this patient's community-acquired pneumonia?

The correct answer to the question "A 45-year-old previously healthy man presents with fever, cough productive of purulent sputum, and pleuritic chest pain. A chest X-ray shows a lobar infiltrate. He has no significant comorbidities and has not been on antibiotics recently. Which of the following is the most appropriate empiric antibiotic regimen for this patient's community-acquired pneumonia?" is Option B: Azithromycin.

The other options — A) Amoxicillin, C) Ceftriaxone and azithromycin, D) Vancomycin and piperacillin-tazobactam — are incorrect for this USMLE Exam Prep question. As explained above: For an outpatient, previously healthy patient with community-acquired pneumonia, a macrolide (like azithromycin) or doxycycline is recommended as first-line empiric therapy. Ceftriaxone and azithromy…