Nitroglycerin is in a group of drugs called nitrates. Nitroglycerin dilates (widens) blood vessels, making it easier for blood to flow through them and easier for the heart to pump.

Nitroglycerin transdermal (skin patch) is used to prevent attacks of chest pain (angina). This medicine will not treat an angina attack that has already begun.

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  • Minitran, Nitro TD Patch-A, Nitro-Dur
  • Less common
    Bloating or swelling of the face, arms, hands, lower legs, or feet
    burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
    difficult or labored breathing
    feeling faint, dizzy, or lightheadedness
    feeling of warmth or heat
    flushing or redness of the skin, especially on the face and neck
    headache
    rapid weight gain
    sweating
    tightness in the chest
    tingling of the hands or feet
    unusual weight gain or loss
    Rare
    Bluish-colored lips, fingernails, or palms
    dark urine
    fever
    pale skin
    rapid heart rate
    sore throat
    unusual bleeding or bruising
    unusual tiredness or weakness
    Incidence not known
    Arm, back, or jaw pain
    blurred vision
    chest pain or discomfort
    chest tightness or heaviness
    confusion
    cough
    cracks in the skin
    difficulty with swallowing
    dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
    fainting
    fast, irregular, pounding, or racing heartbeat or pulse
    feeling of constant movement of self or surroundings
    feeling of warmth
    hives, itching, or rash
    increased sweating
    loss of heat from the body
    nausea or vomiting
    puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
    red, swollen skin
    redness of the face, neck, arms, and occasionally, upper chest
    scaly skin
    sensation of spinning
    weakness
    If any of the following symptoms of overdose occur while taking nitroglycerin, get emergency help immediately:

    Symptoms of overdose
    Bluish-colored lips, fingernails, or palms
    blurred or loss of vision
    bulging soft spot on the head of an infant
    change in consciousness
    change in the ability to see colors, especially blue or yellow
    cold, clammy skin
    dark urine
    difficulty breathing
    disturbed color perception
    dizziness or lightheadedness
    double vision
    fever
    flushed skin
    halos around lights
    headache, severe and throbbing
    increased sweating
    loss of appetite
    loss of consciousness
    night blindness
    overbright appearance of lights
    pale skin
    paralysis
    slow or irregular heartbeat
    sore throat
    tunnel vision
    unusual bleeding or bruising
    unusual tiredness or weakness
    Some of the side effects that can occur with nitroglycerin may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

    Less common
    Abdominal or stomach pain
    body aches or pain
    congestion
    hoarseness
    lack or loss of strength
    runny nose
    sneezing
    stuffy nose
    tender, swollen glands in the neck
    voice changes
  • (nitroglycerin) patch