argenx announces US FDA approval expanding Vyvgart and Vyvgart Hytrulo for use in all adult patients living with gMG

argenx

8 May 2026 - argenx today announced the US FDA approved a label expansion for Vyvgart (efgartigimod alfa-fcab) and Vyvgart Hytrulo (efgartigimod alfa and hyaluronidase-qvfc) for the treatment of adult patients with generalised myasthenia gravis. 

The approved supplemental biologics license application expands Vyvgart’s indication to include all serotypes of adult patients living with  generalised myasthenia gravis– anti-AChR-Ab positive, anti-MuSK-Ab positive, anti-LRP4-Ab positive, and triple seronegative.

Read argenyx press release

Michael Wonder

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Michael Wonder

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Outcome , Medicine , US , Registration