nitroglycerin transdermal (generic name)

Nitro TD Patch-A (brand name)

It relaxes blood vessels, increasing the blood and oxygen supply to your heart
(nye troe GLI ser in)
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What is this medicine?

NITROGLYCERIN (nye troe GLI ser in) is a type of vasodilator. It relaxes blood vessels, increasing the blood and oxygen supply to your heart. This medicine is used to prevent chest pain caused by angina. It will not help to stop an episode of chest pain.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • liver disease
  • low blood pressure, or low blood volume

-previous heart attack or heart failure

  • an unusual or allergic reaction to nitroglycerin, adhesives, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

This medicine is for external use only. Follow the directions on the prescription label. One patch contains a full day's supply of medicine. It is usually worn for 12 to 14 hours a day and removed for 10 to 12 hours. Apply the patch to an area on the upper body that is clean, dry and hairless. Avoid injured, irritated, calloused, or scarred areas. Use a different site each day to prevent skin irritation. Do not cut or trim the patch. Do not use your medicine more often than directed. Do not stop using this medicine suddenly or your symptoms may get worse. Ask your doctor or health care professional how to gradually reduce the dose.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?

If you miss a dose, apply the patch as soon as you can. Do not wear two patches at the same time unless told to by your doctor or health care professional.

What may interact with this medicine?

Do not take this medicine with any of the following medications:
  • certain migraine medicines like ergotamine and dihydroergotamine (DHE)
  • medicines used to treat erectile dysfunction like sildenafil, tadalafil, and vardenafil

This medicine may also interact with the following medications:

  • medicines for high blood pressure
  • other medicines used to treat angina

What should I watch for while using this medicine?

Check your heart rate and blood pressure regularly while you are using this medicine. Ask your doctor or health care professional what your heart rate and blood pressure should be and when you should contact him or her. Tell your doctor or health care professional if you feel your medicine is no longer having any effect.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this drug affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol can make you more drowsy and dizzy. Avoid alcoholic drinks.

If you are going to have a MRI procedure, let your MRI technician know about the use of these patches. Some drug patches contain an aluminum backing that can become heated when exposed to MRI and may cause burns. You may need to temporarily remove the patch during the MRI procedure.

If the patch pulls loose or falls off, fold it in half (sticky side in) and throw away out of the reach of children or pets. Replace with a fresh patch.

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Last Updated: July 10, 2009
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