Emergency Medical Technician (EMT) Practice Test

What is the typical dosage of nitroglycerin?

1. 0.2 mg

2. 0.4 mg

3. 0.6 mg

4. 0.8 mg

The correct answer is: 0.4 mg

The typical dosage of nitroglycerin for the treatment of angina pectoris or during an acute myocardial infarction is usually 0.4 mg. This dosage is commonly administered sublingually, allowing for rapid absorption into the bloodstream and quick relief of chest pain. Nitroglycerin acts as a vasodilator, helping to alleviate the workload on the heart by dilating blood vessels, which in turn increases blood flow and oxygen supply to the heart muscle. Understanding this standard dosage is crucial for EMTs, as it ensures effective treatment while minimizing the risk of potential adverse effects associated with higher doses. Higher doses may lead to excessive vasodilation, hypotension, or other complications. Thus, acknowledging 0.4 mg as the standard helps EMTs provide safe and effective emergency care.