1. Pink Sheet
  2. >>Regulatory Trackers
  3. >>US FDA Performance Tracker

Surrogate Endpoint, Safety Questions May Be Too Much For Waylivra To Overcome At US FDA Panel

 
• By Michael Cipriano

Akcea Therapeutics' familial chylomicronemia syndrome drug will be faced with questions about its surrogate endpoint and a thrombocytopenia safety signal.

A surrogate endpoint with uncertain clinical benefits combined with a thrombocytopenia safety signal are among the several factors that could derail the approval prospects of Akcea Therapeutics Inc.'s Waylivra (volanesorsen), which heads for an assessment by the US FDA's Endocrinologic and Metabolic Drugs Advisory Committee May 10 for the treatment of familial chylomicronemia syndrome (FCS).

A modified phosphorothioate antisense oligonucleotide (ASO), Waylivra would be the first pharmacotherapy if approved for the rare genetic syndrome, which...

Read the full article – start your free trial today!

Join thousands of industry professionals who rely on Pink Sheet for daily insights

  • Start your 7-day free trial
  • Explore trusted news, analysis, and insights
  • Access comprehensive global coverage
  • Enjoy instant access – no credit card required
Start Free Trial

Already a subscriber?

More from US FDA Performance Tracker

August Brings Fresh Faces And Tough Calls To US FDA User Fee Calendar

 
• By Bridget Silverman

The FDA could act on 17 applications, including 10 novel agents, during August. Only one would be a second-cycle review.

Complete Response Letter Trio Raises Prospect Of Tidal Shift In Regenerative Medicine Regulation

 
• By Bridget Silverman

Replimune's RP1 oncolytic immunotherapy became the third regenerative medicine to receive an FDA complete response letter this month as the agency appears to re-visit previous agreements about accelerated approval.

US FDA’s Second Half 2025 User Fee Goals Swing Toward Respiratory Disease

 
• By Bridget Silverman

The 43 novel agents with user fee goal dates in the remainder of 2025 have fewer oncologics and infectious disease drugs than the first half of the year.

Slowdown: US FDA’s 2025 Novel Approvals Are On Below-Average Pace

 
• By Bridget Silverman

US FDA's 25 novel approvals in 2025 fell short of the agency's five-year average count, driven by a drop in drugs center approvals; 45 user fee goals remain in second half of year.

More from Regulatory Trackers

Slowdown: US FDA’s 2025 Novel Approvals Are On Below-Average Pace

 
• By Bridget Silverman

US FDA's 25 novel approvals in 2025 fell short of the agency's five-year average count, driven by a drop in drugs center approvals; 45 user fee goals remain in second half of year.

Global Pharma Guidance Tracker - June 2025

 
• By Vibha Sharma and Anabel Costa-Ferreira

Stay up to date on regulatory guidelines from around the world with the Pink Sheet’s Guidance Tracker. The complete Global Pharma Guidance Tracker, with sortable and searchable listings going back to 2014, is available online.

US FDA’s CRL Release More Incremental Than ‘Radical’ Transparency

 
• By Bridget Silverman

The transparency initiative collects CRLs already made public in approval packages on its drugs@fda site to post on the openFDA public portal.