Nitrates are vasodilators which means they relax and widen our arteries and veins. By dilating coronary arteries and veins they can reduce the stress on your heart by improving blood flow. They are commonly used as treatment for angina which is caused by narrowing of the coronary arteries. They come in two forms: fast acting and long acting. Fast acting are used to relieve angina symptoms, they come in a spray form – GTN spray. Long acting forms are used to prevent angina from happening and are not ideal for stopping sudden angina symptoms. These tend to be pills and patches.
Side Effects:
You should always have your nitrate spray with you and be aware of its expiry date, expired GTN sprays are not effective. You can buy GTN spray from your local pharmacy. Common side effects include headaches, dizziness, light headedness and a warm feeling in the face.
If you have coronary heart disease and symptoms occur when exercising you must stop what your doing and spray your GTN and place a nitrate tablet under your tongue. If the symptoms haven’t relieved themselves after 5 minutes, spray or use a tablet again. After another 5 minutes are you are still experiencing symptoms you need to call 999 for an ambulance. The ambulance service will prioritise you as a potential heart attack. If you use the spray repeatedly this can cause your blood pressure to drop too low which can result in fainting.
Finally, if symptoms come on at rest, wakes you up or are more frequent with minimal exertion this can mean unstable angina which is very serious. It is important to seek medical attention if this happens to you. If symptoms don’t resolve within a few minutes call an ambulance. You may be admitted to hospital for further tests.