argenx N.V.'s rare disease drug Vyvgart has flown out of the blocks following the therapy's recent approval in the US for generalized myasthenia gravis (gMG), with sales in the first quarter smashing analyst forecasts.
The US Food and Drug Administration gave the green light to Vyvgart (efgartigimod), Argenx’s first approved product, on 17 December for adults who are anti-acetylcholine receptor (AChR) antibody positive, a sub-group that represents 85% of the total gMG population. The thumbs-up made it the first therapy to be approved from the FcRn inhibitor class and the reception from physicians has been a warm one
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