12.1 Mechanism of Action VYVGART HYTRULO is a coformulation of efgartigimod alfa and hyaluronidase. Efgartigimod alfa is a human IgG1 antibody fragment that binds to the neonatal Fc receptor (FcRn),… Side effects, costs, interactions, manufacturer, and generic alternatives sourced from FDA labels, openFDA FAERS, and CMS NADAC pricing.
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