Nitroglycerin is used to prevent angina (chest pain) caused by coronary artery disease. This medicine is also used to relieve an angina attack that is already occurring. Nitroglycerin belongs to the group of medicines called nitrates. Nitroglycerin, as well as the onset and duration of action of each form, is different. The sublingual or tablet spray of nitroglycerin has a two-minute onset and a twenty-five-minute duration of action. Nitroglycerin is in a class of medications called vasodilators. It works by relaxing the blood vessels so the heart does not need to work as hard and therefore does not need as much oxygen. What is nitroglycerin? Nitroglycerin is used in adults to treat or prevent attacks of chest pain (angina). Nitroglycerin may also be used for purposes not listed in this medication guide. Find patient medical information for Nitroglycerin on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Nitro-Dur (Nitroglycerin) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Nitroglycerin - cas 55-63-0, synthesis, structure, density, melting point, boiling point Nitroglycerin prevents and treats chest pain by relaxing your blood vessels. You should take this medication at the first sign of chest pain or tightness. What is nitroglycerin, and how does it work? Nitroglycerin is a medication that treats angina and anal fissures. It works by promoting blood flow. The body breaks nitroglycerin down into nitric. What does this medication do? Nitrates can be used to prevent chest pain (angina), limit the number of angina attacks that you have, relieve the pain of a current attack, or treat the symptoms of heart failure. Nitroglycerin is a type of nitrate.