system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 72-year-old woman is brought to the emergency department with fever, myalgia, and cough for 3 days. She lives in an assisted living facility and several of her neighbors have had similar symptoms. She has hypertension treated with lisinopril. She has not been vaccinated against influenza. Her temperature is 38.9°C (102.2°F), pulse is 105/min, respirations are 22/min, and blood pressure is 112/62 mm Hg. Pulse oximetry on room air shows an oxygen saturation of 89%. Her leukocyte count is 10,500/mm3, serum creatinine is 0.9 mg/dL, and serum procalcitonin level is 0.05 μg/L (N < 0.06). An x-ray of the chest shows reticulonodular opacities in the lower lobes bilaterally. Blood and sputum cultures are negative. The patient is admitted to the hospital and empirical treatment with ceftriaxone and azithromycin is begun. Two days after admission, her temperature is 37.6°C (99.7°F) and pulse oximetry shows an oxygen saturation of 96% on room air. Her serum procalcitonin level is 0.04 μg/L. Which of the following is the most appropriate next step in management?
assistant
Discontinue ceftriaxone and azithromycin