Lilly Sees Alzheimer’s Drug Decision Delay
Eli Lilly says that an FDA review decision for its experimental Alzheimer’s drug donanemab has been pushed back to the first quarter of 2024. It had previously expected an agency decision by 12/31. In an 11/2 earnings call, Lilly said FDA asked for more time to evaluate data in the donanemab submission.
In July, the company announced full results from the Phase 3 TRAILBLAZER-ALZ 2 study showing that donanemab significantly slowed cognitive and functional decline in people with early symptomatic Alzheimer’s disease (AD). The data were published 7/17 online in the Journal of the American Medical Association.
The full results confirmed previously reported data (see earlier story) showing that in study “participants with low-medium levels of tau [protein neurofibrillary tangles] (n=1182), donanemab treatment significantly slowed decline by 35% on iADRS [integrated Alzheimer's Disease Rating Scale] and 36% on CDR-SB [Clinical Dementia Rating-Sum of Boxes],” according to Lilly. “Among all amyloid-positive early symptomatic AD study participants (n=1736), treatment with donanemab significantly slowed decline by 22% on iADRS and 29% on CDR-SB.”
Lilly says donanemab specifically targets deposited amyloid plaque and has been shown to lead to plaque clearance in treated patients. The therapy “significantly reduced amyloid plaque levels regardless of baseline pathological stage of disease,” it said. “Among all participants, treatment with donanemab reduced amyloid plaque on average by 84% at 18 months, compared with a 1% decrease for participants on placebo. Participants were able to stop taking donanemab once they achieved pre-defined criteria of amyloid plaque clearance.”