3,189 Days: Aduhelm Phase IV Timeline Is Long Among Alzheimer’s Drugs And Other Accelerated Approvals

Pink Sheet and Trialtrove analyses show time given Biogen to complete confirmatory trial exceeds duration of most other late-stage trials of anti-amyloid compounds and is almost double the average time allocated for follow-up studies of novel accelerated approvals since 2016; runway could reflect expectations for a longer follow-up period or potential enrollment challenges.

Runway
The runway is long for the aducanumab confirmatory trial. • Source: Alamy

The US Food and Drug Administration and Biogen, Inc. have been on the defensive over the nearly nine-year timeline the company has in which to complete the confirmatory trial for Aduhelm (aduncaumab-avwa), the Alzheimer’s drug that received a controversial accelerated approval on 7 June.

Under fire for the length of time provided to design and conduct a new Phase IV study to confirm the...

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