MRCP2-4256
A 68-year-old man arrives at the Emergency department with a four-day history of increasing breathlessness, productive cough, and fever. Upon examination, his vital signs are as follows: HR 132 (irregular), BP 89/61 mmHg, RR 29, and temperature 38.7°C. He appears slightly disoriented. The laboratory results show Hb 111 g/L (130-180), WBC 22.5 ×109/L (4-11), Platelets 567 ×109/L (150-400), Na+ 136 mmol/L (137-144), K+ 4.5 mmol/L (3.5-4.9), Urea 8.9 mmol/L (2.5-7.5), Creatinine 114 μmol/L (60-110), and CRP 345 mg/L (<10). A chest x-ray reveals right lower lobe consolidation. Based on current guidelines, what is the appropriate empirical antibiotic regimen to initiate?