3/18/2013

The FDA warned physicians to consider the risks of prescribing azithromycin, which can cause irregular heart rhythms in people who take some heart rhythm drugs or have QT interval prolongation, low potassium or magnesium levels, or a slower-than-normal heart rate. The agency said data show other macrolide drugs and nonmacrolides, including fluoroquinolones, also could potentially cause irregular heart rhythms and other side effects.

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