A 32-year-old otherwise healthy woman presents to her family physician with a 3-day history of fever, productive cough with green sputum and right-sided pleuritic chest pain. She is a non-smoker, takes no medications and has no comorbidities. On examination, her temperature is 38.4 °C, respiratory rate 20 breaths/min, oxygen saturation 97% on room air, and auscultation reveals crackles over the right lower lung zone. She is stable for outpatient care. What is the most appropriate empiric oral antibiotic regimen for her community-acquired pneumonia?