Risk of arrhythmia with azithromycin in high risk patients

The US Food and Drug Administration (FDA) updated its advice on the antibiotic, warning two separate studies now showed azithromycin could cause abnormalities in the electrical activity of the heart.

The safety concern was flagged last year when a study showed 245 additional cardiovascular deaths per million among the patients in the highest decile for cardiovascular disease taking a five-day course of azithromycin compared to amoxycillin

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