Final answer:
The nurse should administer the prescribed dose of morphine sulfate to the client.
Step-by-step explanation:
The nurse should administer the prescribed dose of morphine sulfate to the client. The client is experiencing symptoms of acute pulmonary edema, which is a medical emergency that requires immediate intervention. Morphine sulfate helps to relieve the client's anxiety and reduce preload and afterload, thus improving oxygenation and reducing the workload on the heart.