this post was submitted on 13 Jun 2023
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The trajectory of aducaumab was unfortunate as it only marginally failed the clinical trials, but fortunate in that its successor lecanumab is less associated with negative side effects (particularly ARIA or "brain bleed") but is just as (if not more) effective.
There was also some controversy in the rush for approval for aducanumab, which was done mainly to ensure that people at risk for Alzheimer's could get treatment before they progressed and became ineligible. Of course, this also rubbed some people the wrong way as it probably should have gone through more trials before its approval. Lecanumab did not go through this same "rushed" approval process.