What is the maximum number of nitroglycerin tablets a patient is advised to take in a 15-minute period for chest pain relief?

The correct answer indicates that a patient can take a maximum of five nitroglycerin tablets within a 15-minute period for relief of chest pain, commonly associated with angina or acute coronary syndrome. This guideline is based on the pharmacological action of nitroglycerin, which works by dilating blood vessels to improve blood flow to the heart muscle.

When a patient experiences chest pain, they are advised to take the first tablet and wait five minutes. If pain persists, another tablet can be taken, and this can be repeated up to three times for a total of four tablets within that 15-minute window. However, in certain clinical settings or for specific protocols, healthcare providers may allow for a fifth tablet within that timeframe, especially for patients with severe coronary artery disease.

It is crucial for patients to seek emergency medical attention if their symptoms do not improve after taking the maximum number of tablets, as persistent pain may indicate a more serious event, such as a myocardial infarction. Always following the recommendations of healthcare providers is essential for safe administration of nitroglycerin.