Title: A Simpler Dosing Scheme for Digoxin-Specific Antibody Fragments<br/>Author: Bryan Hayes<br/><a href='http://umem.org/profiles/faculty/369/'>[Click to email author]</a><hr/><p>
Digoxin-specific antibody fragments (Fab) are safe and indicated in all patients with life-threatening dysrhythmias and an elevated digoxin concentration. However, full neutralizing doses of digoxin-Fab are expensive and may not be required (not to mention cumbersome to calculate).</p>
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Based on pharmacokinetic modeling and published data, a new review suggests a simpler, more stream-lined dosing scheme as follows:</p>
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In imminent cardiac arrest, it may be justified to give a full neutralizing dose of digoxin-Fab.</p>
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In acute poisoning, a bolus of 80 mg (2 vials), repeat if necessary, titrated against clinical effect, is likely to achieve equivalent benefits with much lower total doses.</p>
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With chronic poisoning, it may be simplest to give 40 mg (1 vial) at a time and repeat after 60 min if there is no response.</p>
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<fieldset><legend>References</legend>
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Chan BS, et al. Digoxin-specific antibody fragments in the treatment of digoxin toxicity. <em>Clin Toxicol</em> 2014;52:824-36. [<a href="http://www.ncbi.nlm.nih.gov/pubmed/25089630">PMID 25089630</a>]</p>
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