After each nitroglycerin dose, which vital sign should be reassessed?

• A. Heart rate
• B. Respiratory rate
• C. Blood pressure
• D. Oxygen saturation

Answer: (C)

Nitroglycerin causes vasodilation, which can lower blood pressure quickly by reducing preload and systemic vascular resistance. Because keeping the patient’s perfusion stable is critical, blood pressure must be reassessed after each dose to ensure they remain hemodynamically safe and to decide if additional dosing is appropriate. While heart rate, respiratory rate, and oxygen saturation are monitored, the key vital sign to recheck due to nitroglycerin’s effect is blood pressure.