Antiarrhythmic medicines act on the
electrical system of the heart. They block some of the
extra electrical activity in the cells of the heart. This makes the heart beat
Antiarrhythmic medicines are used to treat and prevent irregular
Antiarrhythmic medicines help control irregular heartbeats. They
do not treat the
congenital heart defect itself.
The most common side effects of antiarrhythmic medicines
See Drug Reference for a full list of side effects. (Drug Reference
is not available in all systems.)
Do not give any two medicines at the same time if both have a side
effect of lowering blood pressure. Space them out so that 1 to 2 hours go by
before giving the next medicine.
Doses of some antiarrhythmic medicines are given around the clock,
even during the night. Blood levels of these medicines must remain constant in
order to control irregular heartbeats.
If your child continues to have irregular heartbeats (feels like
the heart is beating funny or very fast) while on antiarrhythmic medicine, talk
to his or her doctor.
Do not stop giving antiarrhythmic medicine without the advice of
your child's doctor. It is dangerous to stop some of these medicines
Complete the new medication information form (PDF) (What is a PDF document?) to help you understand this medication.
January 26, 2012
John Pope, MD - Pediatrics & Larry A. Latson, MD - Pediatric Cardiology & Brian D. O'Brien, MD - Internal Medicine
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