FDA issues heart warning for use of Z-Pak antibiotics

Drug could cause irregular heartbeat

A new warning out from the U.S. Food and Drug Administration (FDA) may make you want to think twice before taking a prescribed Z-Pak to kick an infection.

The FDA warns that azithromycin may cause a potentially fatal irregular heartbeat, particularly for people with known risk factors such as existing QT interval prolongation, low blood levels of potassium or magnesium, a slower than normal heart rate, or use of certain drugs used to treat abnormal heart rhythms, or arrhythmias.

A study from the New England Journal of Medicine found that the risk of cardiovascular death in patients increased with the use of antibacterial drugs.

For more information, visit www.fda.gov

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