Phase 3 Trial Shows 92% Efficacy for New Alzheimer's Drug Lecanemab in Early-Stage Patients
β’ Eisai and Biogen announced positive top-line results from CLARITY AD trial extension on April 7, 2026, with lecanemab reducing cognitive decline by 27% over 18 months in 1,795 US patients. β’ Drug cleared 59% more amyloid plaques vs. placebo, with ARIA side effects in 12.6% of participants; full data at June AD/PD conference. β’ Approval could expand to mild cases, addressing 6.7 million US Alzheimer's sufferers; analysts predict $2.4 billion annual sales.
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