Japan's Ministry of Health has approved Kisunla™ (donanemab-azbt), an Alzheimer's treatment developed by Eli Lilly, for adults with early symptomatic Alzheimer's disease (AD), including mild cognitive impairment and mild dementia stages with confirmed amyloid pathology. Japan, facing a projected 5 million dementia patients by 2030, sees Alzheimer's as the most common cause, accounting for over 67% of cases.
Kisunla, based on Lilly's 35 years of Alzheimer's research, has shown significant cognitive and functional decline reduction in early symptomatic AD patients in the TRAILBLAZER-ALZ 2 study. In this trial, the treatment slowed clinical decline by 35% in participants with low to medium tau protein levels, with a 22% decline reduction in the overall population. The study also demonstrated amyloid plaque clearance of 84% at 18 months.
Kisunla can cause amyloid-related imaging abnormalities (ARIA), detected through MRI scans, and may present as temporary brain swelling or minor bleeding. While most cases resolve, serious or life-threatening conditions can occur. Other side effects include headaches and potential allergic reactions during infusion. However, patients may stop treatment once amyloid plaques are cleared, reducing the infusion burden.
Kisunla represents a critical advance in Alzheimer's treatment, offering patients more time with preserved cognitive and functional abilities.