National Monthly Outpatient Claim-Recorded Lecanemab Drug Amount in Japan During Fiscal Year 2024

Nationwide claim-recorded lecanemab drug amount for outpatient administration within medical institutions increased from 1.05 million mg in April 2024 to 7.73 million mg in March 2025. Under a 60-kg scenario, these amounts corresponded to 807 and 5924 standardized monthly treatment-volume equivalents; these aggregate measures are not patient counts.