The 79-year-old patient with bacterial pneumonia becomes increasingly restless and confused. Temperature is 100° F and pulse, blood pressure, and respirations are elevated since the last assessment 6 hours ago. The initial intervention by the nurse should be to:

A. Administer an NSAID for discomfort: While fever and discomfort may contribute to restlessness, NSAIDs do not address the most urgent concern, which is potential hypoxia. Treating symptoms without first assessing respiratory function may delay appropriate intervention. B. Assess the patient's O₂ saturation: Increasing restlessness and confusion in a pneumonia patient can be early signs of hypoxia, especially in older adults. Oxygen saturation should be evaluated immediately to determine if the patient needs supplemental oxygen or further respiratory support. C. Check the MAR for an order for a mild sedative: Sedatives may worsen confusion and can depress respiratory drive, particularly in hypoxic patients. Administering a sedative without first ruling out hypoxia may pose significant risk. D. Take the patient off of oral fluids: Unless there are clear signs of aspiration or decreased level of consciousness, discontinuing oral fluids is not an appropriate first step. Hydration is important in pneumonia to help thin secretions and support recovery.