Glonoin, also known as nitroglycerin, is a medication used to relieve chest pain that occurs as a result of angina. Synonyms for this medication include nitroglycerin, trinitroglycerin, and glyceryl trinitrate. Nitroglycerin works by relaxing the blood vessels in the body, allowing for increased blood flow and oxygen supply to the heart muscle. Other synonyms for glonoin include anti-anginal medication, vasodilator, and nitrate medication. While glonoin can be effective in treating chest pain, it should only be used under the supervision of a healthcare professional, as it can cause serious side effects such as headaches, dizziness, and rapid heartbeat.