Once every four weeks maintenance dosing may be easier for patients and care partners to continue treatment  

Alzheimer's disease progression does not stop after plaque clearance; ongoing treatment with LEQEMBI can slow disease progression and prolong the benefits of therapy

TOKYO and CAMBRIDGE, Mass., Jan. 26, 2025 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today that the U.S. Food and Drug Administration (FDA) has approved the Supplemental Biologics License Application (sBLA) for once every four weeks lecanemab-irmb (U.S. brand name: LEQEMBI®) intravenous (IV) maintenance dosing. LEQEMBI is indicated for the treatment of Alzheimer's disease (AD) in patients with mild cognitive impairment (MCI) or mild dementia stage of disease (collectively referred to as early AD) in the U.S. After 18 months of once every two weeks initiation phase, a transition to the maintenance dosing regimen of 10 mg/kg once every four weeks may be considered or the regimen of 10 mg/kg once every two weeks may be continued.

LEQEMBI is the only FDA-approved anti-amyloid therapy that potentially could offer the convenience of a subcutaneous injection with at-home administration option

TOKYO and CAMBRIDGE, Mass., Jan. 13, 2025 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today that the U.S. Food and Drug Administration (FDA) has accepted Eisai's Biologics License Application (BLA) for lecanemab-irmb (U.S. brand name: LEQEMBI®) subcutaneous autoinjector (SC-AI) for weekly maintenance dosing. LEQEMBI is indicated for the treatment of Alzheimer's disease (AD) in patients with Mild Cognitive Impairment (MCI) or mild dementia stage of disease (collectively referred to as early AD). A Prescription Drug User Fee Act (PDUFA) action date is set for August 31, 2025.

TOKYO and CAMBRIDGE, Mass., Dec. 4, 2024 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today that the Federal Commission for the Protection Against Sanitary Risk (COFEPRIS) in Mexico has approved humanized anti-soluble aggregated amyloid-beta (Aβ) monoclonal antibody "LEQEMBI®" (lecanemab) for the treatment of early Alzheimer's disease (AD)*.

TOKYO and CAMBRIDGE, Mass., Nov. 27, 2024 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today that the humanized anti-soluble aggregated amyloid-beta (Aβ) monoclonal antibody "LEQEMBI®" has been launched in South Korea. LEQEMBI received the Ministry of Food and Drug Safety (MFDS) approval in May 2024 for treatment in adult patients with mild cognitive impairment due to Alzheimer's disease (AD) or mild AD dementia (early AD).

TOKYO and CAMBRIDGE, Mass., Nov. 14, 2024 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today a positive opinion has been received from the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) recommending approval of the amyloid-beta (Aβ) monoclonal antibody lecanemab as a treatment of adult patients with a clinical diagnosis of mild cognitive impairment and mild dementia due to Alzheimer's disease (Early Alzheimer's disease)  who are apolipoprotein E ε4 (ApoE ε4)* non-carriers or heterozygotes with confirmed amyloid pathology.1 Eisai had requested a re-examination of the prior negative opinion adopted by the CHMP in July 2024. In accordance with European Medicines Agency regulatory process, the European Commission is expected to make a final decision on the marketing authorization application (MAA) of lecanemab based on the CHMP recommendation within 67 days of receipt of CHMP opinion.2 

FOR GLOBAL MEDIA AND JOURNALISTS OUTSIDE THE EMEA REGION 

In Great Britain, lecanemab is indicated for the treatment of mild cognitive impairment and mild dementia due to Alzheimer's disease (AD) in adult patients that are apolipoprotein E ε4 (ApoE ε4)* heterozygotes or non-carriers1

Great Britain becomes the first country in Europe to authorize the medicine, which targets an underlying cause of AD1

TOKYO and CAMBRIDGE, Mass., Aug. 22, 2024 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today that the humanized amyloid-beta (Aβ) monoclonal antibody "Leqembi®" (brand name, generic name: lecanemab) has been granted a Marketing Authorization by the Medicines and Healthcare products Regulatory Agency (MHRA) in Great Britain.1 Lecanemab is indicated for the treatment of mild cognitive impairment (MCI) and mild dementia due to Alzheimer's disease (AD) in adult patients that are apolipoprotein E ε4 (ApoE ε4)* heterozygotes or non-carriers.1 Lecanemab becomes the first treatment for early AD (MCI and mild dementia due to AD)2 that targets an underlying cause of the disease, to be authorized in a country in Europe.1