Press Releases

Real-World Findings Support Long-Term Benefits of Continuous Treatment with LEQEMBI and Provide Important Insights into Treatment Experience Outside of a Clinical Trial Setting TOKYO and...

LEQEMBI IQLIK is a first-of-its-kind anti-amyloid treatment worldwide, offering at-home dosing for initiation and maintenance (approved in the U.S.) U.S. launch of LEQEMBI IQLIK as an initiation...

Measuring the plasma eMTBR-tau243 biomarker may serve as a practical, less invasive method of capturing Alzheimer's disease-specific pathological changes and may play an important role in...

New clinical and real-world data support a subcutaneous treatment pathway from initiation through maintenance treatment, offering dosing convenience for patients and care partners TOKYO and...

Eisai Co., Ltd. announced today the company will present the latest findings from its Alzheimer's disease (AD) research, including lecanemab (brand name: LEQEMBI®), our anti-amyloid beta (Aβ)...

Eisai Co., Ltd. and Biogen Inc. (Nasdaq: BIIB) today announced that the U.S. Food and Drug Administration (FDA) has extended the review period by three months for the supplemental Biologics...

Eisai Inc. announced today the company will present the latest findings on lecanemab (generic name, brand name: LEQEMBI®), Eisai's anti-amyloid beta (Aβ) protofibril antibody for the treatment...

Eisai Inc. announced today that screening for global Study E2086-G000-202 (Study 202) to assess the efficacy, safety and tolerability of E2086, a novel selective orexin-2 receptor, is now...

Real-World LEQEMBI Data Shows Patients Choose to Stay on Long-Term Treatment TOKYO and CAMBRIDGE, Mass., March 20, 2026 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito,...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today the company will present the latest findings on lecanemab (generic name, U.S. brand name: LEQEMBI®), Eisai's...

If approved, LEQEMBI IQLIK would be the first and only anti-amyloid treatment to offer at-home injection options for initiation and maintenance dosing for this progressive, relentless disease FDA...

Long-term LEQEMBI treatment suggests potential to delay disease progression from Mild Cognitive Impairment (MCI) to moderate Alzheimer's disease by up to 8.3 years in low-amyloid group who started...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Etalanetug demonstrated reduction of eMTBR-tau243, a novel CSF and plasma biomarker that specifically reflects tau tangle pathology, in Phase Ib/II study TOKYO, Dec. 1, 2025 /PRNewswire/ -- Eisai...

LEQEMBI IQLIK, if approved for initiation dosing, would be the first and only anti-amyloid treatment to offer at-home injection from the start of therapy to help patients and care partners treat...

Latest findings from Eisai's robust Alzheimer's disease (AD) pipeline explore long-term treatment with lecanemab and estimated time savings over 10 years, safety and potential benefits of...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen") announced today...

New LEQEMBI CompanionTM program launched to expand helpful resources for patients throughout the treatment journey, including Nurse Educators who can provide patients with injection training, and...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today that etalanetug (development code: E2814), an investigational anti-MTBR (microtubule binding region) tau antibody,...

E2086 Showed Potential to Improve Wakefulness in People Living with Narcolepsy Type 1 TOKYO, Sept. 8, 2025 /PRNewswire/ -- Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai")...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today that the company will deliver a total of 11 presentations, including clinical data on the selective orexin 2...

LEQEMBI IQLIK, if approved for initiation dosing, would be the first and only anti-amyloid treatment to offer at-home injection from the start to help patients and care partners treat this...

LEQEMBI IQLIK is the first and only anti-amyloid treatment to offer an at-home injection to help patients and care partners continue to treat this progressive, relentless disease after initial treatment of 18 months

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Lecanemab subcutaneous autoinjector has the potential to become a new expanded treatment option for patients with early Alzheimer's disease, their care partners and healthcare professionals, with...

Data Showed LEQEMBI Slowed Clinical Decline by 1.75 Points on CDR-SB at Four Years Compared to the Natural History of Alzheimer's Disease 56% of Patients with Low Tau Continued to Demonstrate...

Latest findings from Eisai's robust Alzheimer's disease (AD) pipeline include results from lecanemab long-term data, an immunoassay for measuring amyloid-β protofibrils in cerebrospinal fluid,...

Eisai Inc. announced today that the company will present the latest findings from its robust neurology portfolio, including data on real-world experience and continued maintenance dosing with our...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

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...

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....

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Eisai Inc. announced today its sponsorship of the upcoming webinar, "Lessons Learned from Central Disorders of Hypersomnolence and Future Directions", a key educational event from the Sleep...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

-Eisai Initiates Phase II Clinical Study on Sporadic Early Alzheimer's Disease- TOKYO, Oct. 30, 2024 /PRNewswire/ -- Eisai Co. Ltd (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today...

-New testing method highlights link between protofibrils and biomarkers for neurodegeneration- -Patient and caregiver perspectives on five-year treatment with lecanemab - - Utilization of blood...

Eisai Co. Ltd (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today that the company will present the latest findings on its Alzheimer's disease (AD) pipeline and research, including...

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)...

TOKYO and CAMBRIDGE, Mass., August 14, 2024 – Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, “Eisai”) and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge,...

- 51% of No Tau / Low Tau Patients Showed Improved Cognition and Function Over Three Years; Only Lecanemab Has Clinical Data in No Tau / Low Tau Patient Group - Clinical Data and Biomarkers Show...

Latest findings from Eisai's robust Alzheimer's disease (AD) pipeline will be shared, including the importance of continued treatment of AD, which is a progressive neurodegenerative disease that...

Eisai Inc. announced today that screening for Study E2086-A001-101 (Study 101) to assess the efficacy, safety and tolerability of E2086, a novel selective orexin-2 receptor, is now registered on...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") and Biogen Inc. (Nasdaq: BIIB, Corporate headquarters: Cambridge, Massachusetts, CEO: Christopher A. Viehbacher, "Biogen")...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today that its U.S. subsidiary Eisai Inc. has decided to invest up to 15 million USD in C2N Diagnostics LLC...

Eisai Co., Ltd. (Headquarters: Tokyo, CEO: Haruo Naito, "Eisai") announced today the company will present the latest findings on lecanemab (U.S. brand name: LEQEMBI®), Eisai's anti-amyloid beta...

INVESTIGATIONAL SUBCUTANEOUS FORMULATION CLEARS 14% MORE PLAQUE THAN IV, PHARMACOKINETICS (AUC) 11% HIGHER, AND SIMILAR ARIA RATES TO IV 76% OF PATIENTS SHOWED NO DECLINE AND 60% SHOWED CLINICAL...