A nurse is planning care for a client who has angina and a new prescription for nitroglycerin ointment. Which of the following actions should the nurse plan to take?

The correct answer is A: Cover the administration area with plastic wrap. This is important because nitroglycerin ointment is a potent vasodilator that can be absorbed through the skin. Covering the area with plastic wrap helps to ensure proper absorption and prevents inadvertent contact with others. B: Massaging the ointment can lead to excessive absorption and potential overdose. C: Spreading the ointment in a large area can also lead to excessive absorption. D: Applying the ointment in a thick layer can result in erratic absorption and inconsistent therapeutic effects. Therefore, option A is the most appropriate action to ensure safe and effective administration of nitroglycerin ointment.