argenx wins UK MHRA approval of Vyvgart

17 December 2025

The UK Medicines and Healthcare products Regulatory Agency (MHRA) has granted a new indication for Dutch immunology companyargenx (Euronext: ARGX) Vyvgart (efgartigimod alfa) under the reliance review process sending the firm’s shares up 2% to 742.20 euros.

Efgartigimod alfa is now approved for subcutaneous injection for the treatment of adult patients with progressive or relapsing active chronic inflammatory demyelinating polyneuropathy (CIDP) after prior treatment with corticosteroids or immunoglobulins. Efgartigimod alfa has been granted orphan designation, in recognition of its potential to address the significant unmet needs associated with this rare disease.

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