Sanofi's Xenpozyme Is First Drug Approved For Rare Genetic Disease ASMD

The US FDA approved the enzyme replacement therapy for the condition also known as Niemann-Pick disease; it will be priced at a median annual cost of $780,000 per year.

Approval stamp
FDA approved the first drug for ASMD, a rare genetic disease. • Source: Shutterstock

The US Food and Drug Administration approved Sanofii's Xenpozyme (olipudase alfa) as the first treatment for non-central nervous system (non-CNS) manifestations of acid sphingomyelinase deficiency (ASMD) on 31 August. The ultra-rare genetic disease, historically known as Niemann-Pick disease types A, A/B and B, is a progressive disease linked to significant morbidity and mortality.

For Sanofi, the commercial opportunity will be relatively limited given the small patient numbers. Only 120 patients are diagnosed with ADMD in the US, two-thirds of whom are pediatric patients, according to Sanofi

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