A nurse is providing discharge teaching for a client who has pulmonary edema and is about to start taking furosemide. Which of the following instructions should the nurse include?

A. Eat foods that contain plenty of potassium. – Furosemide is a loop diuretic that promotes the excretion of potassium, which can lead to hypokalemia. Clients should be advised to consume potassium-rich foods (e.g., bananas, oranges, spinach) to help maintain normal electrolyte levels. B. Take the medication at bedtime. – Furosemide causes increased urination. Taking it at bedtime may lead to nocturia and disturbed sleep. It is best taken in the morning. C. Expect some swelling in the hands and feet. – Furosemide is used to reduce fluid overload and edema. Persistent swelling could indicate inadequate response or another issue and should be reported. D. Take aspirin if headaches develop. – Aspirin can increase the risk of bleeding and gastric irritation, especially in clients who may be volume-depleted from diuretics. Headaches should be reported rather than self-treated.