Amilia Jayasinghe has just undergone a hip replacement. She has received morphine 10 mg intravenously for pain relief. Over the course of half an hour, her blood pressure drops to 80/60 mmHg from 110/80 mmHg, and her respiration rate drops to 12 from 15 breaths/min. What actions would you take? Provide rationales for your answer.

(See Tables 11.1 and 11.6 in Chapter 11 for assistance.)