Anril® Spray is a metered-dose sublingual spray containing 400 micrograms of Nitroglycerin per spray. Each canister delivers 200 metered sprays, providing a convenient and effective method for the acute relief of angina pectoris (chest pain) due to coronary artery disease. Nitroglycerin acts as a vasodilator, relaxing vascular smooth muscle and reducing the heart's workload by dilating blood vessels