Ray WA, Murray KT, Hall K, Arbogast PG, Stein CM. Azithromycin and the risk of cardiovascular death. The New England journal of medicine. 2012 May 17;366(366). 1881-90. PMID: 22591294 [PubMed] PMCID: PMC3374857 NIHMSID: NIHMS381524.
Although several macrolide antibiotics are proarrhythmic and associated with an increased risk of sudden cardiac death, azithromycin is thought to have minimal cardiotoxicity. However, published reports of arrhythmias suggest that azithromycin may increase the risk of cardiovascular death.