This medication is used before physical activities (such as exercise, sexual activity) to prevent chest pain (angina) in people with a certain heart condition (coronary artery disease). It may also be used to relieve chest pain in these people once it occurs.
Isosorbide dinitrate belongs to a class of drugs known as nitrates. Angina occurs when the heart muscle is not getting enough blood. This drug works by relaxing and widening blood vessels so blood can flow more easily to the heart.
How To Use
Sit down before using this medication. Place 1 tablet under the tongue and allow it to dissolve as directed by your doctor. Do not chew or swallow the tablet. The dosage is based on your medical condition and response to treatment.
If you are using this medication to prevent chest pain before physical activities, use it 15 minutes before the activity.
If you are using this medication to relieve chest pain once it occurs, use it as soon as possible. If you still have chest pain or if it has worsened 5 minutes after you use this drug, call emergency medical help (911). After calling the emergency number, use another dose. Five minutes after the second dose, if you still have chest pain or the ambulance has not arrived, use a third dose. Do not use more than 3 doses during an attack unless directed by your doctor.