Biogen, Eisai Amend Their Alzheimer's Drug Marketing Pact

  • Eisai Co Ltd ESALY is giving up its right to share in profits from Aduhelm (aducanumab-avwa), which was developed in partnership with Biogen Inc BIIB.
  • Biogen and Eisai have amended their agreement to give Biogen full authority to make regulatory and sales decisions regarding Aduhelm.
  • From 2023, Eisai will receive royalties starting at 2% of Aduhelm's global sales, increasing as sales rise, reaching 8% when Aduhelm's sales exceed $1 billion annually.
  • In December, Biogen reduced the price of Aduhelm by about 50% in the wake of lower-than-expected sales. 
  • Related: Biogen's Alzheimer's Drug Clocks Q4 Sales Of Just $1M, FY22 Earnings Guidance Below Consensus.
  • The companies said the financial terms of their partnership to develop another Alzheimer's drug, lecanemab, would remain unchanged. 
  • Eisai is responsible for leading the regulatory approval process for lecanemab globally, and Biogen is entitled to 50% of profits and losses related to the drug.
  • The companies extended their agreement for Biogen to manufacture the drug from five years to 10 years.
  • Price Action: BIIB shares closed 0.06% lower at $193.64 during after-hours trading on Monday.
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