The study titled “Amyloid-Related Imaging Abnormalities in 2 Phase 3 Studies Evaluating Aducanumab in Patients With Early Alzheimer Disease"
was published online yesterday, November 22nd, 2021 in JAMA Neurology.
Key points in the study:
" Question What are the characteristics of amyloid-related imaging abnormalities (ARIA) during aducanumab treatment in individuals with early Alzheimer disease?
Findings In an integrated safety data set of 2 phase 3 clinical trials (EMERGE and ENGAGE) including 3285 participants, 425 patients (41.3%) in the combined 10 mg/kg aducanumab group (n = 1029) experienced ARIA; ARIA-edema occurred in 362 patients (35.2%), and 94 of these patients (26.0%) experienced associated symptoms (eg, headache, confusion, dizziness, and nausea). ARIA-microhemorrhage and ARIA–superficial siderosis occurred in 197 patients (19.1%) and 151 patients (14.7%), respectively.
Meaning Amyloid-related imaging abnormalities occurred in approximately 40% of participants in the phase 3 studies of aducanumab, and approximately one-quarter of these patients experienced symptoms."
These data and the patient death on Aduhelm following ARIA-E and ARIA-H suggests the FDA will require a black box warning in the Aduhelm label.