A tougher warning instituted by the US Food and Drug Administration this week cautions that azithromycin, a commonly prescribed antibiotic, most certainly can cause modifications to the heart’s electrical activity, which can cause some users to develop a deadly irregular heart rhythm. The federal agency had modified the drug’s warning labels last year.
Azithromycin (also known as Z-Pak) was requested in 55.3 million prescriptions last year alone. It is made by Pfizer.
This more stringent warning comes following the FDA’s review of a study published in the Spring of 2012 in the New England Journal of Medicine. Per the study, taking azithromycin over five days appears to slightly increase the changes of death compared to in other patients that were taking other antibiotics. Some of these azithromycin users suffered fatal heart attacks, cardiac death, strokes, and other cardiovascular conditions.
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