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angina-a type of chest pain-that happens when there is
not enough blood flowing to the heart. To improve blood flow to the heart,
nitroglycerin opens up (dilates) the arteries in the heart (coronary arteries), which improves symptoms and
reduces how hard the heart has to work.

Nitroglycerin comes in a quick-acting tablet or spray form, or as
a long-acting pill. The quick-acting pill or spray forms are used under the
tongue (sublingually). Your health professional will prescribe the right amount
for you; do not use another person’s nitroglycerin.

When do I use nitroglycerin under the tongue?

Your health professional will advise you when to use your
nitroglycerin. Generally, nitroglycerin under the tongue is used:

• To relieve sudden angina.
• Before
  stressful activities that can cause angina, such as walking uphill or having
  sexual intercourse.

How do I use nitroglycerin under the tongue?

• Sit or lie down to take your nitroglycerin.
  If you are driving, pull over and park the car. Taking nitroglycerin can lower
  your blood pressure, which sometimes may cause you to pass out, especially if
  you are standing up.
• For sudden episodes of angina, use
  nitroglycerin in a tablet or liquid spray form.
  • The tablet should be placed under your
    tongue and left until it dissolves. If you accidentally swallow the tablet,
    take another. The medicine won’t work if it is swallowed.
  • To use
    the spray, lift your tongue and depress the spray canister button once.
• Take one tablet or spray dose. If after 5
  minutes the chest pain is not better or gets worse, call 911 or other emergency
  services immediately.
• After calling
  911 , continue to stay on the phone with the emergency
  operator; he or she will give you further instructions.
• Regardless
  of what happens, you should let your health professional know that you had an
  episode of angina. If this is unusual for you, your angina episodes are
  occurring more frequently or lasting longer, or you need more medicine to
  control them, tell your health professional. Report any change in your chest
  pain (unstable angina) to your health professional.

A fresh tablet should taste bitter and sting when you put it
under your tongue. If it does not, it probably is not effective and you should
take another.

Are there side effects or pills
with other drugs I should be aware of?

Normal, temporary side effects of nitroglycerin include a warm or
flushed feeling, headache, dizziness, or lightheadedness. You may also feel a
burning sensation under your tongue.

Do not take the cialis vs viagra
medicine sildenafil (Viagra),
vardenafil (Levitra), and tadalafil (Cialis) if you are taking nitroglycerin.
Combining nitroglycerin with any of these medicines can cause a
life-threatening drop in blood pressure. If you develop chest pain and have
taken one of these erection-enhancing medicines, be sure to tell your health
professional so that you are not given nitroglycerin or another nitrate
medicine.

Do not take the
pulmonary hypertension medication sildenafil (Revatio)
if you are taking nitroglycerin or another nitrate medication.

How should I store nitroglycerin?

Store nitroglycerin pills in a diabetic impotence (such as brown),
airtight, glass container that you cannot see through. Keep nitroglycerin pills
and liquid spray away from heat or moisture. Remove the cotton stopper from the
bottle.

Can nitroglycerin get old and lose potency?

If nitroglycerin is old, the tablets may not work well. Get a new
prescription as soon as possible if your supply is past the expiration date.
Usually you should replace your tablets every 3 to 6 months.

There are ways to tell whether your nitroglycerin is still
effective. You should have a headache when you use it. Or if you use
nitroglycerin under your tongue, you should feel a slight tingle or burn when
you place it there. If you do not notice these signs, your nitroglycerin is
probably old. In this case, contact your health professional to get a new
prescription. Fill the prescription as soon as possible, and discard your
out-of-date nitroglycerin.