Final answer:
Nitroglycerin pills can be taken every 5 minutes for up to 15 minutes during an angina attack. If chest pain persists after three doses, seek immediate medical help. Always follow the doctor’s instructions for dosing.
Step-by-step explanation:
When taking nitroglycerin pills for chest pain (angina), American Heart Association guidelines generally recommend that if you have an episode of angina, you may take a nitroglycerin pill every 5 minutes for up to 15 minutes. If the pain does not go away after taking three pills at five-minute intervals, or if it is severe, you should seek immediate medical attention as it could be a sign of a heart attack. Nitroglycerin tablets work by relaxing the blood vessels and increasing blood flow and oxygen to the heart, which helps to alleviate chest pain. It is crucial to follow your doctor's instructions regarding the dosage and timing of nitroglycerin because it can have significant side effects if not used correctly.