Nitroglycerin topical ointment is being initiated for a client with angina. Which health teaching…

Nitroglycerin topical ointment is being initiated for a
client with angina. Which health teaching would be most appropriate?

1. Keep the medication in the refrigerator.

 2. Only take this medication when chest pain is severe.

 3. Remove the old paste before applying the next dose.

 4. Apply the ointment on the chest wall only