The nurse is caring for a client in the medical-surgical unit. Exhibits The nurse is considering administering a medication for the client's concern of constipation. Which of the following medication is indicated for constipation? Select the best option from the drop-down list to best answer the question.

A. Digoxin: This medication is used for heart failure and atrial fibrillation, not for constipation. B. Sildenafil: This medication is used to treat erectile dysfunction, not constipation. C. Lactulose: Lactulose is an osmotic laxative commonly used to treat constipation. It works by drawing water into the stool to make bowel movements easier. D. Spironolactone: Spironolactone is a potassium-sparing diuretic used to treat heart failure and fluid retention, not constipation.