India's Sun Pharmaceutical has signed an agreement to acquire US biotech Concert Pharmaceuticals and its lead drug deuroxilitinib, in phase 3 testing for alopecia areata, a leading cause of hair loss.

Pfizer has picked up approval in the EU for Litfulo, its JAK inhibitor for severe alopecia areata, extending its challenge to Eli Lilly’s first-to-market Olumiant.

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