1. A patient with chronic heart failure is prescribed digoxin. Which of the following is a crucial nursing intervention for monitoring this medication? A. Assessing for hypertension B. Monitoring serum electrolyte levels C. Evaluating the patient's pain level D. Checking for skin rashes Answer: B. Monitoring serum electrolyte levels Rationale: Digoxin has a narrow therapeutic window and is affected by serum electrolyte levels, particularly potassium. Monitoring these levels is essential to prevent digoxin toxicity. 2. A nurse is caring for a patient who is receiving chemotherapy. Which pharmacological agent is most appropriate for preventing nausea and vomiting? A. Ondansetron B. Metoclopramide C. Lorazepam D. Dexamethasone Answer: A. Ondanse