The most likely reason why the US Food and Drug Administration extended its review times for Pfizer Inc.’s abrocitinib and Xeljanz (tofacitinib), as well as Eli Lilly and Company and Incyte Corporation’s Olumiant (baricitinib), is due to safety concerns about JAK inhibitors that arose in January. Less clear is what the delays will mean for the drugs’ commercial prospects.
Lilly/Incyte said 6 April that the FDA had extended the review period for Olumiant in adults with moderate to severe...





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