A nurse is teaching a client about self-administration of sublingual nitroglycerin. Which of the following statements should the nurse include?

A. "You should take a dose every night at bedtime." Sublingual nitroglycerin is not taken on a routine schedule like bedtime. It is used as needed at the onset of chest pain or before activities that might trigger angina, not as a preventive nightly dose. B. “You should take this medication with food." Sublingual nitroglycerin is placed under the tongue and absorbed directly into the bloodstream, bypassing the gastrointestinal system. It does not require administration with food. C. "You may repeat a dose after five minutes." If chest pain persists after the first dose, the client may take one tablet every 5 minutes, up to a total of three doses within 15 minutes. If the pain continues after the third dose, emergency services should be contacted. D. “You may crush this medication if needed." Sublingual tablets should never be crushed or swallowed, as this would prevent proper absorption through the oral mucosa and reduce the medication’s effectiveness in relieving acute chest pain.