The 71-year-old previously healthy patient is admitted to the hospital for dehydration after 3 days of malaise and productive cough with green sputum. Right lower lobe consolidation is noted on x-ray. Leukocytosis is revealed by a complete blood count. Vitals are notable for a temp of 40.4°C, heart rate of 122 bpm, respiratory rate of 22, and blood pressure of 104/62 mm Hg. Oxygen saturation is 84% on room air, but improves to 100% with 2L 100% FiO2 via nasal cannula. The nurse prepares to administer which medications? Select all that apply.