FDA OKs Genzyme’s Xenpozyme for ASMD
FDA has approved Genzyme’s Xenpozyme (olipudase alfa) for intravenous infusion in pediatric and adult patients with acid sphingomyelinase deficiency (ASMD). The agency says Xenpozyme is the first approved medication to treat symptoms that are not related to the central nervous system in patients with ASMD.
Xenpozyme is described as an enzyme replacement therapy that helps reduce sphingomyelinase accumulation in the liver, spleen, and lung. Its efficacy in treating ASMD was demonstrated in a placebo-controlled study of 31 patients. “Because the study had the placebo comparator and measured treatment benefits that could be detected during the study’s duration, FDA was able to conclude that Xenpozyme is effective,” the agency says. “Overall, treatment with Xenpozyme improved lung function and reduced liver and spleen size.”
The labeling has a Boxed Warning for severe hypersensitivity reactions, including anaphylaxis. Xenpozyme received fast track, breakthrough therapy, and priority review, as well as orphan drug designation. FDA awarded Genzyme a rare pediatric disease priority review voucher, an incentive to encourage the development of new drugs and biologics that prevent and treat rare diseases in children.