Eisai and Biogen unable to dispel doubts on Alzheimer's drug

26 October 2018

Additional data from a Phase II trial on a drug being developed by Japan's Eisai (TYO: 4523) and US biotech Biogen (Nasdaq: BIIB) has failed to win over doubters that this could be the long-awaited answer for a step forward in Alzheimer’s.

July’s results from Study 201 of BAN2401, an anti-amyloid beta protofibril antibody, had initially excited investors by pointing at a reduction in amyloid plaques among Alzheimer’s patients.

But as more data was revealed, the results looked less promising. Confused investors started to question the strength of the data on learning that patients receiving lower doses of BAN2401 declined at a faster rate than those given placebo.

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