Final answer:
Peripheral edema can be an indication of heart failure. The nurse should instruct the client to monitor for and report the development of peripheral edema.
Step-by-step explanation:
Pulmonary edema is excess fluid in the air sacs of the lungs, a common symptom of heart and/or kidney failure. Pulmonary edema can be life-threatening because it compromises gas exchange in the lungs, and anyone having symptoms should immediately seek medical care. In the case of metoprolol, peripheral edema can be an indication of heart failure. The nurse should instruct the client to monitor for and report the development of peripheral edema to ensure timely intervention and management.