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Aduhelm’s ‘Complex’ Circumstances Drove Extensive In-House Advice Process Before Accelerated Approval, Cavazzoni Says

Executive Summary

Accelerated approval was considered as option in response to the negative advisory committee vote, but it was not a ‘default,’ CDER officials say. ‘It fit like a glove.’

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US FDA Sees Leqembi Data As Vindicating Its Approach To Alzheimer’s Drugs

Two-and-a-half years after Aduhelm’s tumultuous advisory committee, FDA finally gets positive vote it was looking for, albeit on a different product. Leqembi meeting serves to endorse CDR-SB as clinical endpoint as well as amyloid plaque as surrogate for reduction in decline.

Leqembi Phase II Missed Clinical Endpoint But Still Provided Support For Amyloid Surrogate

Pink Sheet's Drug Review Profile digs into the FDA memos on Eisai/Biogen’s lecanemab; Phase II clinical efficacy results were reviewed for whether they supported the likelihood of amyloid plaque reduction to predict clinical benefit, rather than whether they directly provided substantial evidence of effectiveness.

Eisai’s Lecanemab: US FDA Showed Flexibility On Clinical Endpoint Results, Safety Database Size

Alzheimer’s drug’s failure to meet Phase II endpoint did not preclude accelerated approval in light of statistically significant reduction in amyloid plaque and ‘generally consistent and favorable results on clinical endpoints.’ Size of six-month safety database also fell shy of ICH guidelines.

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