A nurse is assisting in the care of a client who is receiving morphine via a continuous epidural infusion. Which of the following findings should the nurse report to the provider immediately?

A. Constipation is a common side effect of opioids but not an immediate concern. B. Respiratory depression is a severe side effect of morphine and requires immediate attention. C. Facial flushing is a common side effect of opioids but is not immediately concerning. D. While low blood pressure may be a concern, respiratory rate is a more critical indicator of potential life-threatening complications.