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?

A. Cover the administration area with plastic wrap. After applying nitroglycerin ointment, the area should be covered with plastic wrap or a transparent dressing to prevent evaporation and ensure proper absorption through the skin. This also helps prevent the medication from accidentally transferring to another person or clothing. B. Massage the ointment into the skin. Nitroglycerin ointment should not be massaged into the skin, as this can cause rapid absorption and lead to hypotension and dizziness due to vasodilation. Instead, it should be applied as a thin, even layer and covered with a dressing. C. Spread the ointment in a 10 cm² (4 in²) area. The correct application method involves measuring the exact prescribed amount (e.g., using the applicator paper) and applying it in a thin layer. The area of application may vary based on the dosage, but the focus should be on accurate measurement, not a specific area size. D. Apply the ointment in a thick layer. A thick application is unnecessary and could increase absorption too quickly, leading to side effects such as headache, dizziness, and hypotension. Instead, a measured dose should be spread thinly and evenly onto clean, dry skin.