Sublingual nitroglycerin tablets begin to work within 1 to 2 minutes. How should the nurse instruct the client to use the drug when chest pain occurs?

D Take one tablet. If pain persists after 5 minutes, take two tablets. If pain still persists 5 minutes later, call the physician. C Take one tablet, then an additional tablet every 5 minutes for a total of three tablets. Call the physician if pain persists after three tablets. B Take one tablet and rest for 10 minutes. Call the physician if pain persists after 10 minutes. A Take one tablet every 2 to 5 minutes until the pain stops.