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In 2001, the FDA issued a warning about droperidol as a potential cause of QT prolongation and torsades de pointes. But the evidence for an association was weak (NEJM JW Emerg Med Jul 2003 and Ann Emerg Med 2003; 41:546), and subsequent studies have shown droperidol to be safe and effective not only for agitation but also for nausea (NEJM JW Emerg Med Nov 2007 and Anesthesiology 2007; 102:1081; NEJM JW Emerg Med Jun 2006 and Am J Emerg Med 2006: 24:177).
Investigators in Australia now report a large observational study of electrocardiogram (ECG) abnormalities after droperidol administration. Included were 1009 patients who had an ECG performed within 2 hours of receiving droperidol (median dose, 10 mg; interquartile range, 10 to 17.5 mg). A …