The client, diagnosed with coronary artery disease and a recent myocardial infarction, is being discharged. The client has a medical prescription for nitroglycerin sublingual as needed. Which nursing instruction is correct?

A. Nitroglycerin should be placed sublingually and not swallowed. B. This instruction pertains to transdermal nitroglycerin, not sublingual tablets. C. The recommended use for sublingual nitroglycerin involves one tablet every 5 minutes, up to a total of 3 tablets if pain is not relieved, not placing multiple tablets at once. D. If chest pain is not relieved by one sublingual nitroglycerin tablet, the patient should take up to a total of 3 tablets at 5-minute intervals and seek emergency help if pain persists.