The US Food and Drug Administration’s accelerated approval of Biogen, Inc. and Eisai Co., Ltd.’s Alzheimer’s drug Aduhelm (aducanumab) on the basis of a surrogate endpoint is destined to further inflame the debate over the agency’s use of the expedited pathway and leaves a host of challenges in its wake.
On 7 June, the agency granted accelerated approval to aducanumab, an amyloid beta-directed antibody, for treatment of Alzheimer’s. The FDA...






