FDA approves Leqembi Iqlik® (lecanemab-irmb) subcutaneous injection as a starting dose for early Alzheimer's disease
Rhea-AI Summary
BioArctic (Nasdaq Stockholm: BIOA B) reports that partner Eisai has received FDA approval for a supplemental Biologics License Application for once-weekly subcutaneous Leqembi Iqlik (lecanemab-irmb) as a starting dose for treating early Alzheimer's disease in US adults. The US launch is planned for late August 2026.
The approved initiation regimen is 500 mg once weekly, delivered as two 250 mg autoinjector doses of about 15 seconds each. Leqembi Iqlik is already approved in the US for maintenance at 360 mg once weekly after 18 months of IV or SC treatment, enabling at-home therapy from initiation through maintenance with flexibility to switch between IV and SC administration.
According to BioArctic, sub-studies from the Phase 3 Clarity AD long-term extension showed subcutaneous dosing achieved exposure equivalent to IV, supporting similar efficacy and amyloid removal, with a generally similar safety profile. Injection-related reactions were observed, mostly localized, and systemic reactions were less frequent. An autoinjector acceptability study found 94% of patients and care partners considered the device easy to use with high satisfaction in at-home settings.
Positive
- FDA approval of Leqembi Iqlik SC starting dose for early Alzheimer’s disease in US
- US launch targeted for late August 2026, expanding commercial availability
- Subcutaneous initiation regimen of 500 mg once weekly via autoinjector approved
- SC dosing showed exposure equivalent to IV in Phase 3 Clarity AD LTE sub-studies
- Maintenance dosing at 360 mg once weekly already approved after 18 months of treatment
- 94% of patients and care partners found the autoinjector easy to use in a study
Negative
- Subcutaneous Leqembi associated with injection-related reactions, though mostly localized
News Market Reaction – BIOA
In the Jul 14 session, BIOA gained 4.57%, reflecting a moderate positive market reaction. Argus tracked a trough of -8.1% from its starting point during tracking. Our momentum scanner triggered 17 alerts that day, indicating notable trading interest and price volatility.
Data tracked by StockTitan Argus on the day of publication.
Key Figures
Previous Fda approval Reports
| Date | Event | Sentiment | 24h Move | Catalyst |
|---|---|---|---|---|
| Aug 29 | FDA approval | Positive | -5.7% | FDA approval for subcutaneous Leqembi maintenance dosing in early Alzheimer’s. |
| Jan 26 | FDA approval | Positive | -0.6% | FDA approval for new IV maintenance dosing schedule of Leqembi in US. |
24h Move is the share-price change in the day after each event; other market factors may also have contributed.
Past FDA approval headlines for Leqembi have on average been followed by share price declines rather than rallies.
Key Terms
subcutaneous medical
intravenous medical
autoinjector technical
phase 3 medical
AI-generated analysis. How Rhea-AI works. Not financial advice.
Leqembi Iqlik is a first-of-its-kind anti-amyloid treatment worldwide, offering at-home dosing for initiation and maintenance. It is administered via an autoinjector, offering a convenient alternative to intravenous (IV) infusion from the start of treatment. For initiation, the approved regimen is 500 mg once weekly, delivered as two 250 mg injections, each administered in approximately 15 seconds.
Leqembi Iqlik is already approved for maintenance dosing in the US at 360 mg once weekly, once 18 months of IV or subcutaneous treatment has been completed. Patients can now receive Leqembi either as an IV infusion or as a subcutaneous injection (SC) with Leqembi Iqlik throughout the entire treatment course - from initiation through maintenance and may switch between administration methods as needed, providing greater flexibility and convenience.
Leqembi is indicated in the US for the treatment of adults with mild cognitive impairment (MCI) or mild dementia due to Alzheimer's disease, collectively referred to as early Alzheimer's disease. MCI due to Alzheimer's disease represents the earliest symptomatic stage of the disease and may be associated with subtle changes in memory, thinking, language, or daily functioning.
Clinical data supporting FDA approval of subcutaneous initiation dosing
The FDA approval of Leqembi Iqlik for treatment initiation is supported by a comprehensive clinical data package evaluating SC administration of lecanemab across multiple studies and dosing regimens. Data from sub-studies within the Phase 3 Clarity AD long-term extension (LTE), conducted following the 18-month core study in individuals with early Alzheimer's disease, showed:
- Once-weekly subcutaneous administration achieved exposure equivalent to intravenous dosing, supporting similar clinical (efficacy) and biomarker (amyloid removal) benefits.
- The rate of exposure-related adverse events such as ARIA-E with SC administration is expected to be comparable with IV administration. There was no increase in isolated ARIA-H (i.e., ARIA-H in patients who did not also experience ARIA-E) for Leqembi compared to placebo.
- The overall safety profile of SC administration was generally similar to intravenous administration. Injection-related reactions were observed with subcutaneous Leqembi, most of which were localized, while systemic reactions were less frequently observed.
"This approval represents another important step forward in the treatment of Alzheimer's disease," said Gunilla Osswald, CEO of BioArctic. "By providing a new administration option from the start of treatment, patients, caregivers and healthcare professionals gain greater flexibility in how therapy is delivered. As the Alzheimer's treatment landscape continues to advance, innovations that simplify access and support individualized care will be increasingly important. We are encouraged to see Eisai's diligent work to meet the diverse needs of people living with this difficult disease."
Expanding treatment flexibility across the Alzheimer's disease care pathway
The approval of Leqembi Iqlik as a subcutaneous starting dose provides patients and care partners with the only at-home administration option throughout the Alzheimer's disease treatment journey which could support access and delivery of care across healthcare settings. Subcutaneous administration may:
- Reduce the burden of clinic visits for patients and care partners
- Reduce reliance on infusion and associated healthcare resources
- Decrease treatment preparation and administration time, and nursing monitoring requirements
- Preserve infusion capacity for patients who prefer or require intravenous therapy
Insights from an autoinjector acceptability study indicated that
Please see full Prescribing Information for Leqembi, including Boxed WARNING.
This is information that BioArctic AB (publ) is obliged to disclose pursuant to the EU Market Abuse Regulation. The information was released for public disclosure, through the agency of the contact person below, on July 13, 2026, at 11:55 pm CEST.
For further information, please contact:
Oskar Bosson, VP Communications and Investor Relations
E-mail: oskar.bosson@bioarctic.com
Telephone: +46 704 107 180
Jenny Ljunggren, External Communications and Investor Relations Manager
E-mail: jenny.ljunggren@bioarctic.com
Telephone: +46 76 013 86 08
About Leqembi® (lecanemab)
Leqembi is the result of a strategic research alliance between BioArctic and Eisai. It is a humanized immunoglobulin gamma 1 (IgG1) monoclonal antibody directed against aggregated soluble (protofibril) and insoluble forms of amyloid-beta (Aβ).
Leqembi is approved in 53 countries and is under regulatory review in 6 countries. Following the initial phase with treatment every two weeks for 18 months, intravenous (IV) maintenance dosing with treatment every four weeks is approved in 8 countries, including the
Since July 2020, Eisai's Phase 3 clinical study (AHEAD 3-45) with lecanemab in individuals with preclinical Alzheimer's disease meaning they are clinically normal and have intermediate or elevated levels of amyloid in their brains, is ongoing. The study was fully recruited in October 2024. AHEAD 3-45 is a four-year study conducted as a public-private partnership between Eisai, Biogen and the Alzheimer's Clinical Trial Consortium that provides the infrastructure for academic clinical trials in Alzheimer's disease and related dementias in the US, funded by the National Institute on Aging, part of the National Institutes of Health. Since January 2022, the Tau NexGen clinical study for Dominantly Inherited Alzheimer's disease (DIAD), that is conducted by Dominantly Inherited Alzheimer Network Trials Unit (DIAN-TU), led by Washington University School of Medicine in
About the collaboration between BioArctic and Eisai
Since 2005, BioArctic has a long-term collaboration with Eisai regarding the development and commercialization of drugs for the treatment of Alzheimer's disease. The most important agreements are the Development and Commercialization agreement for the lecanemab antibody, which was signed 2007, and the Development and Commercialization agreement for the antibody lecanemab back-up for Alzheimer's disease, which was signed 2015. In 2014, Eisai and Biogen entered into a joint development and commercialization agreement for lecanemab. Eisai is responsible for the clinical development, application for market approval and commercialization of the products for Alzheimer's disease. BioArctic has the right to commercialize lecanemab in the Nordic region and is currently preparing for commercialization in the Nordics together with Eisai. BioArctic has no development costs for lecanemab in Alzheimer's disease and is entitled to payments in connection with sales milestones as well as royalties on global sales.
About BioArctic AB
BioArctic AB (publ) is a Swedish research-based biopharma company focusing on innovative treatments that can delay or stop the progression of neurodegenerative diseases. The company invented Leqembi® (lecanemab) – the world's first drug proven to slow the progression of the disease and reduce cognitive impairment in early Alzheimer's disease. Leqembi has been developed together with BioArctic's partner Eisai, who are responsible for regulatory interactions and commercialization globally. In addition to Leqembi, BioArctic has a broad research portfolio with antibodies against Parkinson's disease and ALS as well as additional projects against Alzheimer's disease. Several of the projects utilize the company's proprietary BrainTransporter™ technology, which has the potential to actively transport antibodies across the blood-brain barrier to enhance the efficacy of the treatment. BioArctic's B share (BIOA B) is listed on Nasdaq Stockholm Large Cap. For further information, please visit www.bioarctic.com.
[1]Based on in-person interviews of 50 patients with early Alzheimer's Disease and 50 care partners currently assisting people with early AD. Participants were given the opportunity to interact with a training autoinjector device (containing no needles or medication) and an injection pad, then asked to answer computer-based surveys about their experience, including "How difficult or easy was it to use the self-injection device?"
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SOURCE BioArctic