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Medicines lecanemabQuestion & answer

lecanemab · Medicine question

Is it known whether lecanemab passes into human breast milk?

iatroX medicinesPublished 8 November 2026

The answer

Answer

It is not known whether lecanemab passes into human breast milk, as there are no data on its presence in human milk.

Sources for this answer

Leqembi 100 mg/mL concentrate for solution for infusionEisai Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 5Document updated 24 November 2025

Sources checked 8 November 2026

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lecanemab

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