Released: March 16, 2013

F.D.A. raises heart alert on antibiotic in wide use

Source: Sabrina Tavernise - The N.Y. Times (Paid Registration)

The Food and Drug Administration on Tuesday toughened a warning it made last year about the potential risks of azithromycin, a commonly used antibiotic that can cause changes in the electrical activity of the heart that may lead to a fatal irregular heart rhythm in some patients.

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