| Published June 30, 2025

Sobi receives FDA approval for Gamifant at MAS

Sobi has received FDA approval for Gamefant (emapalumab-lzsg) for the treatment of macrophage activation syndrome (MAS) in Still's disease. The approval is based on phase III data in which 54 percent of patients achieved a complete response at week 8. Gamifant is the first FDA-approved treatment for MAS and works by blocking gamma interferon. The drug is already approved for primary hemophagocytic lymphohistiocytosis (HLH).