There is growing evidence that levalbuterol is not associated with any cardiac benefit. In this small study of ICU patients, they were randomized to albuterol or levalbuterol every 4-6 hours; mean increases in heart rates were only ~1 beat per minute after either drug, and rates of arrhythmias were very small (only 1 patient with non-sustained Vtach of 5 beats). The use of levalbuterol in ICU patients to avoid tachycardia or arrhythmias is not warranted (abstract)
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