A nurse is caring for a school-age child who is postoperative and received morphine via IV bolus for pain 10 min ago. Which of the following findings is the nurse's priority?

Rationale: A. Bradypnea: Respiratory depression is the most serious and potentially life-threatening adverse effect of morphine, especially after IV administration when onset is rapid. Bradypnea indicates a compromised airway and inadequate ventilation, making it the nurse’s priority for immediate assessment and intervention to prevent hypoxia and respiratory arrest. B. Sedation: Sedation is a common effect of morphine and requires monitoring, but it is less immediately dangerous than respiratory depression. The nurse should assess the depth of sedation and level of consciousness while ensuring airway safety. C. Constipation: Constipation is a common long-term side effect of opioids, but it is not an immediate threat to life. Preventive measures can be planned, but it does not take priority over acute respiratory compromise. D. Euphoria: Euphoria may occur with opioid administration and is generally not harmful in the short term. While the nurse should monitor for behavioral changes or signs of misuse, it does not pose an immediate risk compared with respiratory depression.