Eisai Opts In On Biogen's High-Profile Aducanumab

Biogen secures stronger economics for the Phase III Alzheimer's disease drug in the US and Europe in the joint development/commercialization agreement; Eisai picked up rights to Biogen's MS portfolio in Japan and other Asian markets.

Human brain illustrated with millions of small nerves - Conceptual 3d render

Eisai Co. Ltd. has exercised its right to opt-in on Biogen Inc.'s Phase III Alzheimer's disease candidate aducanumab with terms that appear favorable to Biogen. The companies announced the expansion of their existing development and commercialization deal Oct. 23.

Biogen will continue to oversee the development of the anti-amyloid beta antibody and receive 55% of profits in the US...

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