Biogen(US:BIIB) Globenewswire·2025-11-25 12:30Core Insights - LEQEMBI IQLIK, if approved, would be the first anti-amyloid treatment allowing at-home injections from the start of therapy for Alzheimer's disease [1][5] - The FDA has received a Supplemental Biologics License Application (sBLA) for LEQEMBI IQLIK, which is indicated for early Alzheimer's disease [1][5] - The sBLA is supported by data showing that subcutaneous administration of lecanemab is as effective as intravenous dosing [2][3] Group 1: Product Development and Approval - Eisai has completed the rolling submission of the sBLA for LEQEMBI IQLIK to the FDA, which has granted Fast Track Status [1] - The sBLA includes data from Phase 3 studies demonstrating that a 500 mg weekly subcutaneous dose provides equivalent exposure and benefits compared to bi-weekly intravenous administration [2] - If approved, the autoinjector would allow patients to choose between subcutaneous and intravenous administration throughout their treatment [3] Group 2: Mechanism of Action - LEQEMBI targets both protofibrils and amyloid plaques, which are key contributors to Alzheimer's disease progression [4] - Protofibrils are considered the most toxic form of amyloid-beta and are believed to cause significant neuronal damage [6] Group 3: Market Presence - LEQEMBI is currently approved in 51 countries and regions and is under regulatory review in 9 additional countries [5][29] - The U.S. FDA approved LEQEMBI IQLIK for weekly subcutaneous maintenance dosing in August 2025, following an 18-month intravenous treatment [5][30] Group 4: Safety Profile - The safety profile of LEQEMBI IQLIK is similar to that of the intravenous formulation, with a low incidence of systemic injection-related reactions [2][29] - Common adverse reactions include infusion-related reactions (26% with LEQEMBI vs. 7% with placebo) and amyloid-related imaging abnormalities (ARIA) [29]