A nurse is caring for a client whose serum potassium level is 5.3 mEq/L. Which of the following scheduled medications should the nurse plan to administer?

A. Potassium iodide is used in certain conditions such as thyroid disorders or radiation exposure, but it does not impact potassium levels. Administering potassium iodide is not appropriate for a client with elevated potassium levels. B. Furosemide is a loop diuretic that helps to eliminate excess potassium from the body through urine. This is particularly useful in cases of hyperkalemia (high potassium levels). C. Lisinopril, an ACE inhibitor, can contribute to hyperkalemia in some patients. D. Digoxin should be used cautiously with elevated potassium levels because hyperkalemia increases the risk of digoxin toxicity, leading to life-threatening arrhythmias. The nurse should monitor potassium closely before administering digoxin.