As Biogen gets squishy on timing for an aducanumab filing, the clock is ticking

There are few things in this world more squishy than Wonder Bread. Exception: Biogen’s answers to the question of when it will submit aducanumab to the Food and Drug Administration.

On Thursday, Biogen said a filing for the controversial Alzheimer’s drug would be completed “as soon as possible.” That’s slightly different but no more definitive than the company’s previous guidance for an aducanumab submission in “early 2020.”

An analyst on Biogen’s earnings conference call asked Chief Medical Officer Al Sandrock to explain the “gating factors” to completing the aducanumab submission.

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