US Food and Drug Administration reviewers appear unpersuaded that Amylyx Pharmaceuticals, Inc. has provided the confirmatory evidence needed to support approval of its amyotrophic lateral sclerosis drug AMX0035 on the basis of a single Phase II trial.
Amylyx’s ALS Drug Lacks ‘Confirmatory Evidence’ Needed To Support Approval On Single Study, FDA Says
New analyses on individual responders, survival and biomarker data are not independent evidence of AMX0035’s clinical effect in ALS, agency says in advisory committee briefing document. However, FDA’s framing of the issues, with an emphasis on regulatory flexibility and unmet medical need, could sway a favorable recommendation in its second panel review.

More from US FDA Performance Tracker
Organizational turmoil has not yet affected reviews of novel agent applications, with Q1 2025 approvals coming in low, but the first quarter share of the entire year is variable.
Sanofi’s Dupixent, Amgen’s Uplizna, and Bristol’s Opdivo seek new indications, while J&J hopes to start a franchise with nipocalimab and Stealth’s day of reckoning approaches.
March features nearly 20 user fee goal dates, including a crowd of novel candidates for crowded areas like hemophilia, heart disease and urinary tract infections, as well as the potentially first therapies for a rare eye disease and hyperphagia of Prader-Willi syndrome.
The US FDA approval of new meningococcal and chikungunya vaccines arrived in time for the 26-28 February meeting of the CDC’s Advisory Committee On Immunization Practices, if political developments allow.
More from Regulatory Trackers
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.
March features nearly 20 user fee goal dates, including a crowd of novel candidates for crowded areas like hemophilia, heart disease and urinary tract infections, as well as the potentially first therapies for a rare eye disease and hyperphagia of Prader-Willi syndrome.
The European Medicines Agency is set to issue opinions this week on whether pan-EU marketing approval should be granted to a number of new products.