US FDA approves Leqembi® IQKLIK ™ (lecanemab-irmb) subcutaneous injection for maintenance dosing for the treatment of early Alzheimer's disease
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Aug 29 2025
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Source: PRnewswire
FDA Approval of Lecanemab Autoinjector
- Approval Announcement: BioArctic AB's partner, Eisai, announced that the U.S. FDA has approved the Biologics License Application for the once-weekly lecanemab subcutaneous injection, branded as LEQEMBI IQLIK, for maintenance dosing in Alzheimer's disease patients.
- Launch Date: The LEQEMBI IQLIK autoinjector is set to be launched on October 6, 2025.
Treatment Details
- Indication: LEQEMBI IQLIK is indicated for patients with mild cognitive impairment (MCI) or mild dementia, collectively referred to as early Alzheimer's disease (AD).
- Dosing Options: After 18 months of intravenous treatment, patients can choose between continuing with IV infusions or switching to the new weekly 360 mg subcutaneous injection.
Significance of Lecanemab
- Mechanism of Action: Lecanemab targets both amyloid plaque and protofibrils, which are believed to contribute to cognitive decline in Alzheimer's disease.
- Unmet Need: There is a significant demand for new treatments that can slow the progression of Alzheimer's disease and alleviate the burden on patients and caregivers.
Patient and Healthcare Benefits
- Home Administration: The autoinjector allows patients to administer treatment at home, reducing the need for visits to infusion centers.
- Resource Efficiency: The subcutaneous formulation is expected to decrease healthcare resources required for IV maintenance, such as preparation and monitoring, while increasing capacity for new patients.
Collaboration Background
- Partnership: The development of lecanemab is a result of a long-term collaboration between BioArctic and Eisai, with BioArctic holding commercialization rights in the Nordic region.
- Financial Structure: BioArctic incurs no development costs for lecanemab and is entitled to regulatory approval payments, sales milestones, and royalties on global sales.
Broader Context
- Global Approval: Lecanemab is approved in 48 countries, including the U.S., Japan, China, and the EU, for treating early Alzheimer's disease and is under review in 10 additional countries.
- Ongoing Studies: Eisai's Phase 3 clinical study (AHEAD 3-45) is ongoing, focusing on individuals with preclinical Alzheimer's disease, and aims to further establish the efficacy of lecanemab.
Company Overview
- BioArctic's Focus: BioArctic AB is a Swedish biopharma company dedicated to innovative treatments for neurodegenerative diseases, with a portfolio that includes projects targeting Alzheimer's, Parkinson's disease, and ALS.
- Market Presence: BioArctic's shares are listed on Nasdaq Stockholm Large Cap, and the company is recognized for developing the first drug proven to slow Alzheimer's disease progression.
About the author

Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.








