The client who has been diagnosed with angina reports chest pain. The client has a prescription for oral sublingual nitroglycerin as needed. What action should the nurse take?

A. It is not recommended to place two tablets under the tongue at once. Only one tablet should be administered at a time. If the pain persists after 5 minutes, a second tablet can be given. Contacting the healthcare provider is appropriate if the pain is unrelieved after the maximum dose of 3 tablets. B. One tablet is placed under the tongue, and if the pain persists, it can be repeated every 5 minutes for up to three doses. If the pain persists after the third dose, emergency medical attention is required. C. Nitroglycerin should not be swallowed, as it is intended to be absorbed quickly under the tongue for rapid action. Water is not necessary for sublingual administration, and repeating the dose in 10 minutes is too long for effective pain relief. D. Administering two additional tablets in 5 minutes is incorrect. Only one tablet should be administered at a time, and the maximum number of doses is three.