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flag Johnson & Johnson's Alzheimer's drug posdinemab failed to slow cognitive decline in early-stage patients, halting its development.

flag Johnson & Johnson's experimental Alzheimer's drug posdinemab has failed to show significant cognitive benefits in a pivotal phase 2 trial, dealing a major blow to hopes for a new treatment targeting tau protein buildup in the brain. flag The results, announced on November 24, 2025, indicate the anti-tau antibody did not slow cognitive decline in patients with early Alzheimer's compared to placebo, prompting the company to reassess its development path. flag The outcome marks another setback in the search for effective Alzheimer's therapies, despite heavy investment and high expectations.

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