Ask your doctor now for exact instructions on how to use your nitroglycerin and when to call for emergency medical help (911).

Read the Patient Information Leaflet if available from your pharmacist before you start using nitroglycerin and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

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 5 to 10 minutes before the activity.

If you are using this medication to relieve chest pain once it occurs, use it as soon as possible. If your chest pain has not improved 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 and the ambulance has not arrived, use a third dose. If your chest pain is not gone after 15 minutes and 3 doses of nitroglycerin, call emergency medical help (911) if you have not called already. Do not use more than 3 doses during an attack unless directed by your doctor.