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Area of Science:

  • Pharmacology
  • Hematology
  • Drug Development

Background:

  • Direct and indirect factor Xa inhibitors are widely used anticoagulants.
  • Reversal agents are needed for managing bleeding events in patients on these therapies.
  • Andexanet alfa is a first-in-class recombinant factor Xa protein designed as a universal antidote.

Purpose of the Study:

  • To summarize the development milestones of andexanet alfa.
  • To highlight its first global approval for reversing anticoagulation.
  • To detail its use in patients treated with rivaroxaban and apixaban.

Main Methods:

  • Review of development history and regulatory submissions.
  • Analysis of clinical data supporting efficacy and safety.
  • Summary of regulatory review processes in the USA, EU, and Japan.

Main Results:

  • Andexanet alfa received US FDA approval in May 2018.
  • The approval is for patients treated with rivaroxaban and apixaban requiring reversal of anticoagulation.
  • Regulatory review is ongoing in the EU, with clinical development in Japan.

Conclusions:

  • Andexanet alfa represents a significant advancement in managing bleeding associated with factor Xa inhibitors.
  • Its approval provides a crucial option for life-threatening or uncontrolled bleeding scenarios.
  • Ongoing development aims to expand its global availability.