This medicine contains nitroglycerin as active ingredient. Nitrates improve the supply of blood and oxygen to the heart. This medication is for oral use. This medication is used to treat and prevent angina (chest  pain).

Nitroglycerin is a vasodilator, which relaxes the muscles of the blood vessels, causing an increase in the oxygen supply to the heart. The oral tablets, capsules, ointment and patches do not act quickly; they are used to prevent chest pain. The sublingual tablets and oral spray act quickly   and can be used to relieve chest pain after it has started.

Prescribed for

This medicine is prescribed for:

•   Chest pain associated with angina pectoris

•    Injection: treatment after a heart attack, for congestive heart failure, and for high blood pressure.

Cautions and Warnings

Do not take this medicine if you are allergic or sensitive to any of its ingredients or to another nitrate product. Do not use the patch form if you are allergic to adhesives.

This drug may be inappropriate for you if you have had a recent heart attack or stroke, or low blood pressure, especially postural low blood pressure (symptoms include dizziness or fainting when rising from a sitting or lying position).

Avoid large amounts of alcohol, because rapidly lower blood pressure may result in weakness, dizziness and fainting.

Before using this medicine

Before you use this medicine check with your doctor, or  pharmacist:

•   if you ever had any unusual or allergic reaction to nitrates or nitrites

•   if you are on a low-salt, low-sugar, or any other special diet, or if you are allergic to any substance, such as sulfites or other preservatives or  dyes

•    if you are pregnant or intend to become pregnant while using this medicine

•   if you are breast-feeding an infant.

•   if you have any of the following medical problems:

•   Anemia

•   Glaucoma

•   Intestinal problems

•   Overactive thyroid


Use only as much as is necessary to control chest pain. Take this medicine exactly as directed by your doctor or pharmacist. It will work only if taken correctly.

Your doctor may prescribe this medicine as:

•   sublingual tablets

•   transmucosal tablets

•   sustained-release tablets

•   sustained-release capsules

•   ointment

•   transdermal patch

•   aerosol

If you have been taking this medicine regularly for several weeks or more, do not suddenly stop using it. Stopping suddenly may bring on attacks of angina.

Side effects

There are a number of side effects that usually do not require medical attention. These possible side effects may go away during treatment; however, if they continue or are bothersome, check with your doctor, nurse, or pharmacist. More common are:

•   Dizziness

•   Lightheadedness

•   Fainting when standing up

•   Fast pulse

•   Flushing of face and neck

•   Headache

•   Nausea

•   Vomiting

Side effects that should be reported to your doctor are:

blurred vision;

dry mouth;

severe or prolonged headache;

skin rash.


Major symptoms of overdose are:


•   Feeling of pressure in head

•   Shortness of breath

•   Weak, fast heartbeat

•   Convulsions

Call a doctor or the emergency room of the hospital. Then give first aid immediately.


Before using this medicine,m check with your doctor or pharmacist if you are now taking any of the following medicines or types of medicines:

•   Antihypertensives

•   Asthma or hay fever medicine

•   Cold medicine

•   Decongestant

•   Medicine for appetite control

•   Narcotic

•   Pain medicine

•   Sinus congestion medicine

Use nitroglycerin with caution with beta-blockers, phenothiazines or other nitrates.

Driving or hazardous work

Do not drive until you learn how the medicine affects you.


Tablets, capsules, and oral spray should be stored as in a tightly capped bottle in a cool, dry place. Ointment and patches should be stored at room temperature in their original containers. Keep out of reach of children.

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About Genomic Medicine UK

Genomic Medicine UK is the home of comprehensive genomic testing in London. Our consultant medical doctors work tirelessly to provide the highest standards of medical laboratory testing for personalised medical treatments, genomic risk assessments for common diseases and genomic risk assessment for cancers at an affordable cost for everybody. We use state-of-the-art modern technologies of next-generation sequencing and DNA chip microarray to provide all of our patients and partner doctors with a reliable, evidence-based, thorough and valuable medical service.

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