Title: Here comes the adexanet alfa!<br/>Author: Hong Kim<br/><a href='http://umem.org/profiles/faculty/526/'>[Click to email author]</a><hr/><p>
On May 3, the FDA approved adexanet alfa, the reversal agent for factor Xa inhibitors - apixaban and rivaroxaban. It received both U.S. Orphan Drug and FDA Breakthrough Therapy designations. </p>
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Unlike indarucizumab (a monoclonal antibody fragment) to reverse dabigatran (direct thrombin inhibitor) associated bleeding, adexanet alfa is a recombinant modified human factor Xa decoy protein. </p>
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A phase 3 study showed that adexanet alfa decreased the anti-factor Xa activity of rivaroxaban by 92% from baseline and by 94% in apixaban treated participants.</p>
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ANNEXA-4 study involving participants with acute major bleeding (GI and intracranial) showed a significant decrease in the anti-factor Xa activity after the bolus dose of adexanet alfa and "effective" hemostasis was noted in 79% of the participants at 12 hours post infusion.</p>
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Andexanet alfa is expected to become available in June 2018.</p>
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