A Patient, Age 65, Has Chronic Angina Pectoris

A patient, age 65, has chronic angina pectoris. Her daughter had questions about the proper use of nitroglycerin for pain management. She was unsure about how many times she should take nitroglycerin for an episode of angina. The best reply the nurse could make is

A) "Continue to take nitroglycerin sublingually at 5-minute intervals until the pain is relieved."
B) "If the pain is not relieved after three doses of nitroglycerin at 5-minute intervals, call your physician and come to the hospital."
C) "When nitroglycerin is not relieving the pain, lie down and rest."
D) "Use oxygen at home to relieve pain when nitroglycerin is not successful."