Japan's Eisai eyes blood test for Alzheimer's drug eligibility

Drugmaker looks to lower hurdles to use of potential blockbuster treatment

20240725N Eisai Leqembi

Eisai targets more than $350 million in global Leqembi sales this fiscal year. (Eisai)

HINAKO BANNO and TAITO KUROSE, Nikkei staff writers

TOKYO -- Japanese pharmaceutical company Eisai is developing a blood test to determine whether patients with Alzheimer's disease can benefit from lecanemab, marking another step in its efforts to expand its dementia treatment and care business.

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