IntroductionLecanemab is a monoclonal antibody targeting amyloid-beta (Aβ) approved for treating Alzheimer’s disease (AD) with mild cognitive impairment or mild dementia. Continuous monitoring of its real-world safety profile remains essential. This study aimed to analyze lecanemab-related adverse events (AEs) using the FDA Adverse Event Reporting System (FAERS) database and a multicenter cohort, and explored mechanisms via network pharmacology.MethodsWe conducted an updated disproportionality a