Pink Sheet Drug Review Profile looks at how the agency determined that Amylyx’s ‘conceptual basis’ for use of the drug’s two active ingredients to treat ALS was enough to satisfy the combination drug rule; the sponsor also was allowed to submit certain animal studies and drug-drug interaction data during the course of the NDA review.
When the US Food and Drug Administration approved Amylyx Pharmaceuticals, Inc.’s amyotrophic lateral sclerosis drug Relyvrio, the agency exercised its regulatory flexibility in concluding there was substantial evidence of effectiveness.
Despite residual uncertainty, the agency said results from a successful, but not statistically persuasive, Phase II trial, along with confirmatory evidence from a post hoc analysis of long-term survival in the same study, met the substantial evidence standard
The company’s failure to show its potency assays measured attributes directly related to the mesenchymal stromal cell product’s therapeutic effect highlights the importance of a robust CMC program for complex cell therapies.
Agency staff repeatedly said the BLA based on a single-arm study in 55 patients lacked substantial evidence of effectiveness in steroid-refractory acute graft-versus-host disease and a randomized trial was needed, but changed course “based on additional consideration” after a second CRL.
The Pink Sheet’s Drug Review Profile looks at the timeline for the clinical development and US FDA review of Mesoblast’s remestemcel for graft-versus-host disease.
The Pink Sheet drug review profile investigates the long and rigorous process behind the FDA’s recent relaxation of the cardiovascular safety warning for testosterone products.
