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Amylyx’ Second Chance Advisory Committee: Two Quasi-Precedents

 
• By Michael McCaughan

US FDA’s plan to reconvene an advisory committee for a second look at Amylyx’ ALS drug AMX0035 is a remarkable twist in the ongoing review. It is essentially unprecedented, though there are two examples from the 1990s that offer some parallels.

WHITE OAK, MD - JULY 20: A sign for the Food And Drug Administration is seen outside of the headquarters on July 20, 2020 in White Oak, Maryland. (Photo by Sarah Silbiger/Getty Images)
• Source: Sarah Silbiger/Getty Images (Sarah Silbiger/Getty Images)

Amylyx Pharmaceuticals, Inc.’s announcement that the US Food & Drug Administration is re-convening the Peripheral & CNS Drugs Advisory Committee for another look at the proposed ALS therapy AMX0035 has plenty of people struggling to think of a precedent for FDA to bring an NDA to an advisory committee twice during the same review cycle. (Also see "Will Amylyx’s ALS Drug Benefit From US FDA’s Aduhelm Experience?" - Pink Sheet, 5 July, 2022.)

There is no shortage of examples of the same application going to an advisory committee more than once. It is...

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More from US FDA Performance Tracker

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.

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.

More from Regulatory Trackers

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.

America Next: Most Novel Agents With July Goal Dates Have Been Approved Overseas

 
• By Bridget Silverman

The US FDA will not be in its usual position as the first regulator to approve novel drugs, with only one of the six novel candidates on the July user fee calendar seeking its first approval worldwide in the US

EU CHMP Opinions And MAA Updates

 
• By Neena Brizmohun

This is an update of recommendations from the European Medicines Agency's Committee for Medicinal Products for Human Use on the authorization of new medicines in the EU, and updates on EU marketing authorization changes recommended by the CHMP.