Zithromax linked to irregular heartbeat, FDA warns - Philadelphia News, Weather and Sports from WTXF FOX 29

Zithromax linked to irregular heartbeat, FDA warns

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CHICAGO (FOX 32 News) -

The FDA is warning the public about Zithromax, one of the most commonly-prescribed antibiotics.

The FDA says azithromycin, which is often referred to as z-pack, has been linked to a potentially fatal irregular heartbeat.

The drug can change the heart's electrical activity and lead to a condition called a "prolonged QT interval," which means the heart's timing gets thrown off.

The FDA says doctors should be careful prescribing azithromycin for patients who are at risk for heart problems.

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