A Post Authorization Registry Study of Participants Treated With LEQEMBI

Brief summary (registry, in English)

To describe the incidence and severity of known adverse events, including amyloid-related imaging abnormalities-edema (ARIA-E), ARIA microhemorrhage and hemosiderin deposit (ARIA-H), and intracerebral hemorrhage greater than 1 cm in diameter in participants treated with LEQEMBI during routine clinical practice, summarizing the data overall and by apolipoprotein E4 variant (APOE4) genotype, concomitant antithrombotic therapy, and baseline magnetic resonance imaging (MRI) findings (comorbid cerebral amyloid angiopathy \[CAA\]). The secondary purpose of this study is, To describe progression to the next stage of Alzheimer's Disease (AD), stratified by ARIA and intracerebral hemorrhage greater than 1 cm. To describe previously unknown adverse events related to the long-term safety of LEQEMBI in routine clinical practice, which were not identified in clinical development, as assessed by serious suspected adverse reactions, adverse reactions leading to discontinuation of LEQEMBI treatment, and deaths that occur within 30 days of discontinuation of LEQEMBI treatment (regardless of causality). To describe drug utilization of LEQEMBI and to assess the effectiveness of risk minimization measures in routine clinical practice.

What you commit to

• Study type: Observational
• Planned participants: 400
• From 30 Jul 2026 to the primary completion date, 1 Apr 2036
• 17 sites in 1 country
• Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Who the study is looking for

Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (17)

Sites in registry order. Pick your city on the disease page to sort them by distance.