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Bayer’s Asundexian Cuts Recurrent Stroke Risk in Phase III Without More Major Bleeding

Bayer now pivots to regulatory engagement, with a full data presentation planned at a scientific meeting.

Overview

  • The registrational trial met primary efficacy and safety goals, with a 50 mg daily dose reducing ischemic stroke versus placebo without increasing ISTH-defined major bleeding.
  • Asundexian was tested alongside antiplatelet therapy in patients with a prior ischemic stroke, according to Bayer’s topline release.
  • The U.S. FDA has granted Fast-Track status to the program for potential stroke prevention.
  • Bayer will begin global discussions on approval filings, while full results remain unpublished until the planned congress presentation.
  • Shares jumped roughly 11–12% as analysts flagged blockbuster potential, with JPMorgan citing >€1 billion in annual sales and Goldman Sachs estimating up to €3 billion; the news follows a 2023 failure in atrial fibrillation and comes as rivals like BMS’s milvexian face setbacks.