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. 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. 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. Nitroglycerin - cas 55-63-0, synthesis, structure, density, melting point, boiling point Find patient medical information for Nitroglycerin on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Doctors usually prescribe nitroglycerin for angina pectoris, which often is called just angina. It’s sudden heart -related chest pain. It happens because something prevents the flow of blood to. Easy-to-read patient tips for nitroglycerin covering how it works, benefits, risks, and best practices. 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 is used for the treatment of angina, acute myocardial infarction, severe hypertension, and acute coronary artery spasms. [1][14] It may be administered intravenously, as a sublingual spray/tablet, or as a patch applied to the skin. 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.