A client with heart failure (HF), who is taking furosemide, reports having muscle cramps and weakness in the lower extremities. Which action should the nurse implement?

Choice A reason: Stretching the foot into dorsiflexion may temporarily relieve muscle cramps, but it does not address the underlying cause. In a client taking furosemide, cramps and weakness are often due to electrolyte imbalances, particularly hypokalemia. This intervention is symptomatic and does not correct the problem. Choice B reason: Restricting potassium-rich foods is inappropriate because furosemide is a potassium-wasting diuretic. Limiting potassium intake would worsen hypokalemia, increasing the risk of arrhythmias and muscle weakness. Choice C reason: Collecting blood for serum electrolytes is the most appropriate action. Furosemide can cause significant losses of potassium, sodium, magnesium, and calcium. Assessing electrolyte levels allows the nurse and provider to identify imbalances and initiate corrective treatment, such as supplementation. This action addresses the root cause of the client’s symptoms. Choice D reason: Encouraging salt intake is contraindicated in heart failure. Excess sodium promotes fluid retention, worsening edema and increasing cardiac workload. This intervention would exacerbate the client’s condition.