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US FDA’s Most Controversial Drug Approval Decisions, From A To Z

 
• By Sue Sutter

With action imminent on Biogen’s Alzheimer’s drug aducanumab, the Pink Sheet looks back at 10 of FDA’s most controversial drug approval decisions, from Addyi to Zohydro.

FDA approval controversies (photo illustration)
During a controversial review, sometimes all sides have pitchforks out at the US FDA. (Pitchforks not shown.) • Source: Photo illustration/Alamy, Shutterstock images

The US Food and Drug Administration’s imminent action on Biogen Pharma and Eisai Co., Ltd.’s Alzheimer’s drug aducanumab is bound to be controversial, regardless of whether the agency approves the biologics license application or issues a complete response letter.

Questions about the robustness of the efficacy data, internal FDA disagreement on the application’s merits, harsh advisory committee criticism of...

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More from US FDA

Double Duty At US FDA: Tidmarsh Will Temporarily Lead Both CDER And CBER

 
• By Sarah Karlin-Smith

Just a week and a half into his tenure at the agency, the new CDER Director George Tidmarsh was also tapped to serve as acting head of CBER. Prasad’s swift ouster at CBER may point to a softening in cell and gene therapy regulation but could also portend even more scrutiny on vaccines.

NDA User Fees Will Grow 8.6% Next Year As FDA Projects More Applications But Fewer Sponsor Meetings

 
• By Nielsen Hobbs and Derrick Gingery

The ups – and some downs – of the US FDA’s prescription, biosimilar, and generic user fees for FY 2026 are tabulated by the Pink Sheet.

Vinay Prasad Out At US FDA

 
• By Sarah Karlin-Smith

The removal of CBER Director Prasad comes after a wave of right-wing backlash to his appointment over the past few days that was also critical of his decision to ask Sarepta to suspend all sales of the DMD gene therapy Elevidys. FDA reversed its decision the day before Parsad's departure.

Sarepta Will Resume US Elevidys Shipments For Ambulatory DMD Patients After FDA Reverses Course

 
• By Mandy Jackson

The FDA recommended removal of a voluntary hold on shipments of the gene therapy to younger patients after finding that the death of an 8-year-old boy in Brazil was unrelated to Elevidys. Discussions on safety of DMD treatment for non-ambulatory patients is ongoing.

More from Agency Leadership

New South Korea Health Minister Vows ‘People-Centric’ Medical System

 
• By Jung Won Shin

In line with new President Lee’s campaign pledges, South Korea's newly confirmed health minister is expected to tackle key issues including a prolonged doctors' conflict, essential drug supplies and R&D support for the industry.

Vinay Prasad Out At US FDA

 
• By Sarah Karlin-Smith

The removal of CBER Director Prasad comes after a wave of right-wing backlash to his appointment over the past few days that was also critical of his decision to ask Sarepta to suspend all sales of the DMD gene therapy Elevidys. FDA reversed its decision the day before Parsad's departure.

Sarepta Will Resume US Elevidys Shipments For Ambulatory DMD Patients After FDA Reverses Course

 
• By Mandy Jackson

The FDA recommended removal of a voluntary hold on shipments of the gene therapy to younger patients after finding that the death of an 8-year-old boy in Brazil was unrelated to Elevidys. Discussions on safety of DMD treatment for non-ambulatory patients is ongoing.