Long-Term Efficacy and Complete Scalp Hair Regrowth in Patients With Alopecia Areata Receiving Ritlecitinib 50 mg Daily Up to 3 Years in the ALLEGRO Clinical Trial Program

    November 2025 in “ SKIN The Journal of Cutaneous Medicine ”
    Brett King, Rodney Sinclair, Lidia Rudnicka … Alexandre Lejeune
    Studysummary In this study, nearly one-third of patients with severe alopecia areata treated with ritlecitinib achieved complete scalp hair regrowth at least once over three years, and most maintained regrowth or stayed at low hair loss levels subsequently.
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    Research cited in this study 2

    1. Efficacy and Safety of Ritlecitinib in Adults and Adolescents With Alopecia Areata: A Randomised, Double-Blind, Multicentre, Phase 2b–3 Trial The Lancet · 2023
    2. The Autoimmune Basis of Alopecia Areata: A Comprehensive Review Autoimmunity reviews · 2014