In 2021, no drug approval garnered as much attention and debate as Biogen Inc.’s Aduhelm (aducanumab). The FDA’s surprise, accelerated approval of Aduhelm for Alzheimer’s disease flew in the face of the recommendation by an advisory committee, causing a stir that included the resignation of three adcom members, along with publicly made claims that the company’s relationship with regulators had become too cozy.