Which instruction should the nurse include in the teaching plan for a client who is taking the diuretic spironolactone?

Rationale: A. Avoid caffeine and smoking: While limiting caffeine and smoking is beneficial for overall cardiovascular health, these lifestyle changes are not specific teaching points related to spironolactone use. The priority teaching should focus on drug-specific safety measures. B. Increase your consumption of bananas and oranges: Bananas and oranges are rich in potassium. Since spironolactone is a potassium-sparing diuretic, increasing potassium intake could place the client at risk for hyperkalemia. C. Call the healthcare provider if you develop gynecomastia: Gynecomastia is a possible side effect of spironolactone, but it is not typically an urgent concern. While it should be reported, it is not the most critical teaching instruction to prevent immediate harm. D. Take the medication in the morning: Spironolactone increases urine output, so taking it at night may cause nocturia and disturb sleep. Administering it in the morning promotes adherence and reduces nighttime disruptions.