Eli Lilly and Co. received approval from the FDA for Kisunla (donanemab-azbt, 350 mg/20 mL once-monthly injection for IV infusion) an Alzheimer’s treatment for adults with early symptomatic Alzheimer’s disease (AD), which includes people with mild cognitive impairment (MCI) as well as people with the mild dementia stage of AD, with confirmed amyloid pathology.

Once-monthly Kisunla is the first and only amyloid plaque-targeting therapy with evidence to support stopping therapy when amyloid plaques are removed, which can result in fewer infusions.

Kisunla can help the body remove the excessive buildup of amyloid plaques and slow the decline that may diminish memory.

In the TRAILBLAZER-ALZ 2 Phase 3 study, people who were the least advanced in the disease experienced the strongest results with Kisunla. Trial participants were analyzed over 18 months in two groupings: one group who was less advanced in their disease (those with low to medium levels of tau protein) and the overall population, which also included participants with high tau levels. Treatment with Kisunla significantly slowed clinical decline in both groups.

Those treated with Kisunla who were less advanced in their disease showed a significant slowing of decline of 35% compared with placebo. In the overall population, the response to treatment was also statistically significant at 22%. Among the two groups analyzed, participants treated with Kisunla had up to a 39% lower risk of progressing to the next clinical stage of disease than those taking placebo.

Among the overall population of participants, Kisunla reduced amyloid plaques on average by 61% at 6 months, 80% at 12 months, and 84% at 18 months compared to the start of the study. One of the treatment goals of the study was to remove amyloid plaques to minimal levels consistent with a visually negative scan using amyloid positron emission tomography (PET).

Kisunla can cause amyloid-related imaging abnormalities (ARIA), which is a potential side effect with amyloid plaque-targeting therapies that does not usually cause symptoms. It can be detected via magnetic resonance imaging (MRI) scans and, when it does occur, may present as temporary swelling in an area or areas of the brain, which usually resolves over time, or as small spots of bleeding in or on the surface of the brain. Infrequently, larger areas of bleeding in the brain can occur. ARIA can be serious, and life-threatening events can occur.