News Briefs: Amylyx Is Withdrawing ALS Drug Relyvrio in U.S., Canada

Apr 11
Apr 11, 2024

Amylyx Pharmaceuticals, Inc. said on April 4 that it was voluntarily discontinuing the marketing authorization for Relyvrio (sodium phenylbutyrate and taurursodiol) in the U.S. and in Canada, where it is known as Albrioza. As part of a restructuring, the company also is laying off about 70% of its workforce. The FDA approved the agent for the treatment of amyotrophic lateral sclerosis (ALS) on Sept. 29, 2022, based on data from a Phase II trial involving 137 people. But on March 8, the company revealed that its Phase III PHOENIX trial did not meet the prespecified primary or secondary endpoints. Prior to the drug’s approval, the FDA’s Peripheral and Central Nervous System Drugs Advisory committee found that the study did not provide substantial evidence that the therapy was effective, but during a second meeting in September reversed course in favor of approval. At the time of Relyvrio’s approval, Amylyx co-founder and co-CEO Justin Klee declared that “if the PHOENIX trial is not successful, we will do what's right for patients, which includes taking the drug voluntarily off the market.” The company will not allow any new prescriptions for the drug, but it will transition current patients who wish to remain on treatment with Relyvrio to a free drug program. Amylyx will present topline data from the PHOENIX trial at the American Academy of Neurology Annual Meeting in Denver on April 16. Read more
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Angela Maas

Angela has an extensive background of editing, reporting and writing for trade and consumer publications. She has written Radar on Specialty Pharmacy since she joined AIS Health in 2005 and has broad knowledge of the various issues at play within the space. She also has written for Spotlight on Market Access since its 2017 launch. Before joining AIS Health, she was managing editor at Employee Benefit News and Employee Benefit News Canada and managing editor at Hem Aware (a hemophilia publication), Lupus Living and Momentum (a multiple sclerosis publication). She has a B.A. in English and an M.A. in British literature from Arizona State University.