Alzheimer's DiseaseNCT07821658
A Postmarketing Study of Lecanemab for the Treatment of Participants With Alzheimer's Disease
An observational study of Alzheimer's Disease, run by Eisai Inc. at 1 site in United States.
Trial summary
The primary purpose of this study is to evaluate the safety of lecanemab-irmb in the real-world clinical setting as reported by events of amyloid-related imaging abnormalities (ARIA)-edema (ARIA-E), ARIA-hemosiderin deposition (ARIA-H), symptomatic ARIA-E, symptomatic ARIA-H, and intracerebral hemorrhage (ICH)… Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Alzheimer's Disease
- How many people
- 6,700 participants
- Where
- 1 siteUnited States
- Study dates
- 23 May 2025to 15 Jan 2035
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Participants prescribed lecanemab-irmb by a physician participating in the ALZ-NET registry.
Who may be able to join
- Enrolled in ALZ-NET
- Either currently receiving or previously received lecanemab-irmb.
Who cannot join
- -None
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site, 1 recruiting
- Recruiting
Eisai Trial Site #1
Nutley, New Jersey, 07110
About this study
Official title: A 10-Year, Postmarketing, Multicenter, Safety Surveillance Study of Lecanemab-irmb for the Treatment of Participants With Alzheimer's Disease in Real-World Clinical Practice (Using Alzheimer's Network for Treatment and Diagnostics [ALZ-NET] Registry Data)
The primary purpose of this study is to evaluate the safety of lecanemab-irmb in the real-world clinical setting as reported by events of amyloid-related imaging abnormalities (ARIA)-edema (ARIA-E), ARIA-hemosiderin deposition (ARIA-H), symptomatic ARIA-E, symptomatic ARIA-H, and intracerebral hemorrhage (ICH) greater-than 1 cm in participants treated with lecanemab-irmb.
The secondary purpose of this study is to:
Read more
Evaluate the safety of lecanemab-irmb in the real-world clinical setting as reported by events of seizures, anaphylaxis, central nervous system (CNS) ischemic event, and death.
Assess the safety of lecanemab-irmb when stratified by baseline characteristics including apolipoprotein E (APOE) genotype, baseline magnetic resonance imaging (MRI) findings consistent with a high risk for cerebral amyloid angiopathy (CAA), prior Alzheimer's Disease (AD) treatments, and antithrombotic therapy.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event, and death) associated with APOE genotype, baseline MRI findings consistent with high risk for CAA, prior AD treatment, and antithrombotic therapy within participants exposed to lecanemab-irmb in ALZ-NET.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event, and death) between participants exposed to lecanemab-irmb in ALZ-NET and subjects exposed to lecanemab irmb in Study 301.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event,and death) between participants exposed to lecanemabirmb in ALZ-NET and subjects exposed to placebo (PBO) in Study 301.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event, and death) between participants exposed to lecanemab-irmb in ALZ-NET and participants not exposed to anti-amyloid therapies in ALZ-NET.
Assess whether the risk of safety outcomes associated with APOE genotype, baseline MRI findings consistent with high risk for CAA, prior Alzheimer's Disease treatments, and antithrombotic therapy differs between participants exposed to lecanemab-irmb in ALZ-NET versus those not exposed to anti-amyloid therapies in ALZ-NET.
Read the detailed description
The study will use data from the ALZ-NET registry, which is expected to include about 20,000 patients being evaluated for- or treated with- new FDA-approved AD therapies. About 6,700 (33%) of these patients are expected to be treated with LEQEMBI.
- Conditions
- Alzheimer's Disease
- Being tested
- No Intervention
- Keywords
- Alzheimer's Disease, Early Alzheimer's Disease, LEQEMBI, ARIA
- Medical subject headings
- Alzheimer Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
No InterventionOther
This is a non-interventional study.
| Study group | Role | What they receive |
|---|---|---|
| All Participants | Participants will be prescribed with lecanemab-irmb by physicians participating in the ALZ-NET registry based on the approved United States Prescribing Information (USPI). Receives: Other: No Intervention |
What is being measured
The primary outcome is the main question the study is designed to answer.
Incidence and exposure-adjusted incidence rate of the adverse events of special interest (AESIs) of ARIA-E, symptomatic ARIA-E, ARIA-H, symptomatic ARIA-H, and ICH greater-than 1 cm in diameter
Measured: Baseline up to Follow-up, up to 10 years
Secondary outcomes (2)
Incidence and exposure-adjusted incidence rate of seizure, anaphylaxis, central nervous system (CNS) ischemic event, and Death
Measured: Baseline up to Follow-up, up to 10 years
Incidence Rate of AESIs
Incidence and exposure-adjusted incidence rate of AESIs will be assessed by count (n) and proportion (%) of APOE genotype, baseline MRI findings consistent with a high risk for CAA, prior AD treatments, and antithrombotic therapy.
Measured: Baseline up to Follow-up, up to 10 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Sep 2026
- Study start23 May 2025
- Primary completion15 Jan 2035 (estimated)
- Study completion15 Jan 2035 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Alzheimer's DiseaseStudies of the same condition, open and under way.
- More trials run by Eisai Inc.The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 6,700 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Eisai Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07821658
- Sponsor's protocol ID
- BAN2401-A001-501
- Status last verified
- Sep 2026
- First submitted
- 9 Sep 2026
- Last updated
- 16 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- Individual data sharing
- Yes: Eisai's data sharing commitment and further information on how to request data can be found on our website http://eisaiclinicaltrials.com/.
Study at a glance
From the registry record, last updated by the sponsor on 16 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A 10-Year, Postmarketing, Multicenter, Safety Surveillance Study of Lecanemab-irmb for the Treatment of Participants With Alzheimer's Disease in Real-World Clinical Practice (Using Alzheimer's Network for Treatment and Diagnostics [ALZ-NET] Registry Data)
- ClinicalTrials.gov ID
- NCT07821658
- Acronym / sponsor ID
- BAN2401-A001-501
- Conditions
- Alzheimer's Disease
- Keywords
- Alzheimer's Disease, Early Alzheimer's Disease, LEQEMBI, ARIA
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 6,700 participants (estimated)
- Lead sponsor
- Eisai Inc.Industry (pharma, biotech, devices)
- Study start
- 23 May 2025 (actual)
- Primary completion
- 15 Jan 2035 (estimated)
- Study completion
- 15 Jan 2035 (estimated)
- First posted
- 16 Sep 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The primary purpose of this study is to evaluate the safety of lecanemab-irmb in the real-world clinical setting as reported by events of amyloid-related imaging abnormalities (ARIA)-edema (ARIA-E), ARIA-hemosiderin deposition (ARIA-H), symptomatic ARIA-E, symptomatic ARIA-H, and intracerebral hemorrhage (ICH) greater-than 1 cm in participants treated with lecanemab-irmb.
The secondary purpose of this study is to:
Evaluate the safety of lecanemab-irmb in the real-world clinical setting as reported by events of seizures, anaphylaxis, central nervous system (CNS) ischemic event, and death.
Assess the safety of lecanemab-irmb when stratified by baseline characteristics including apolipoprotein E (APOE) genotype, baseline magnetic resonance imaging (MRI) findings consistent with a high risk for cerebral amyloid angiopathy (CAA), prior Alzheimer's Disease (AD) treatments, and antithrombotic therapy.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event, and death) associated with APOE genotype, baseline MRI findings consistent with high risk for CAA, prior AD treatment, and antithrombotic therapy within participants exposed to lecanemab-irmb in ALZ-NET.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event, and death) between participants exposed to lecanemab-irmb in ALZ-NET and subjects exposed to lecanemab irmb in Study 301.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event,and death) between participants exposed to lecanemabirmb in ALZ-NET and subjects exposed to placebo (PBO) in Study 301.
Assess the risk of safety outcomes (ARIA-E, ARIA-H, ICH greater than 1 cm, seizures, anaphylaxis, CNS ischemic event, and death) between participants exposed to lecanemab-irmb in ALZ-NET and participants not exposed to anti-amyloid therapies in ALZ-NET.
Assess whether the risk of safety outcomes associated with APOE genotype, baseline MRI findings consistent with high risk for CAA, prior Alzheimer's Disease treatments, and antithrombotic therapy differs between participants exposed to lecanemab-irmb in ALZ-NET versus those not exposed to anti-amyloid therapies in ALZ-NET.
Detailed description
The study will use data from the ALZ-NET registry, which is expected to include about 20,000 patients being evaluated for- or treated with- new FDA-approved AD therapies. About 6,700 (33%) of these patients are expected to be treated with LEQEMBI.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| All Participants | – | Other: No InterventionParticipants will be prescribed with lecanemab-irmb by physicians participating in the ALZ-NET registry based on the approved United States Prescribing Information (USPI). |
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Participants prescribed lecanemab-irmb by a physician participating in the ALZ-NET registry.
Key inclusion criteria (2 listed)
- Enrolled in ALZ-NET
- Either currently receiving or previously received lecanemab-irmb.
Key exclusion criteria (1 listed)
- -None
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| No InterventionThis is a non-interventional study. | Other | All Participants |
Primary outcome
Incidence and exposure-adjusted incidence rate of the adverse events of special interest (AESIs) of ARIA-E, symptomatic ARIA-E, ARIA-H, symptomatic ARIA-H, and ICH greater-than 1 cm in diameter
Time frame: Baseline up to Follow-up, up to 10 years
2 secondary outcomes
Incidence and exposure-adjusted incidence rate of seizure, anaphylaxis, central nervous system (CNS) ischemic event, and Death
Time frame: Baseline up to Follow-up, up to 10 years
Incidence Rate of AESIs
Time frame: Baseline up to Follow-up, up to 10 years
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Sep 2026.
- Individual participant dataSharing planned: Yes. Eisai's data sharing commitment and further information on how to request data can be found on our website http://eisaiclinicaltrials.com/.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Alzheimer's Disease, run by Eisai Inc. at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 16 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Eisai Medical Information (+1-888-274-2378, esi_medinfo@eisai.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Incidence and exposure-adjusted incidence rate of the adverse events of special interest (AESIs) of ARIA-E, symptomatic ARIA-E, ARIA-H, symptomatic ARIA-H, and ICH greater-than 1 cm in diameter (time frame: Baseline up to Follow-up, up to 10 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Sep 2026.