Biogen Aducanumab BLA Plan Is In Line With US FDA Neurology Division Precedent
Biogen and Eisai's surprise decision to advance Alzheimer’s antibody despite mixed clinical results could follow a similar path as pioneering neurodegenerative therapies Xenazine and Rilutek, or more recent Parkinson’s drug Nourianz – or could end with suspended development, like Kyndrisa.
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From EMBARK data to labeling materials, the potential reasons for the three-month user fee delay are as varied as the ups and downs of the Biogen/Eisai Alzheimer’s candidate’s development saga.
Biogen’s Aducanumab: One Positive Phase III Trial Is Good Enough For Demonstrating Efficacy, US FDA Says
Negative results from the Phase III ENGAGE trial – which may have been influenced by imbalance in ‘rapid progressors’ and differential effects of dosing protocol changes – do not negate persuasiveness of positive results from the EMERGE study, agency says in advisory committee briefing document; statistical reviewers dissent, call for a new trial of the Alzheimer's drug.
Given inconsistent study results, robustness of the efficacy evidence is expected to be key focus of the 6 November meeting of the Peripheral and Central Nervous System Drugs Advisory Committee; review could put a December 2019 guidance on the ‘substantial evidence’ standard to the test and offer insight into the amount of flexibility the agency is willing to exercise for neurodegenerative diseases with high unmet need.