A nurse is teaching a client who has a new prescription for digoxin. Which of the following statements should the nurse include in the teaching:

A. "Notify your provider if you experience muscle weakness.": Muscle weakness can be an early sign of hypokalemia, which increases the risk of digoxin toxicity by enhancing the drug’s effects on cardiac tissues. Prompt reporting helps prevent bradyarrhythmias and other serious complications associated with elevated digoxin sensitivity. B. "Report a weight gain of one-half pound per day.": A gain of 0.5 lb per day is not typically used as a threshold for concern in heart failure management; providers generally focus on gains of 2–3 lb in a day or 5 lb in a week. This small fluctuation is often normal and may simply reflect fluid or dietary changes. C. "Expect this medication to increase your blood pressure.": Digoxin does not raise blood pressure; its primary action is to improve myocardial contractility and slow heart rate through vagal stimulation. Clients should not expect hypertensive effects, and blood pressure changes are not a primary teaching point. D. "You will need to take a diuretic while taking this medication.": A diuretic is not automatically required with digoxin because its use depends on the client’s underlying cardiac condition and fluid status. Some diuretics can worsen hypokalemia, increasing the risk for digoxin toxicity, so prescribing them requires careful provider evaluation.