Abstract
Ritlecitinib (LITFULO™), an orally administered kinase inhibitor, is being developed by Pfizer for the treatment of alopecia areata, vitiligo, ulcerative colitis and Crohn's disease. On 23 June 2023, ritlecitinib received approval in the USA for the treatment of severe alopecia areata in adults and adolescents 12 years and older. Ritlecitinib was approved in Japan on 26 June 2023 for the treatment of alopecia areata (limited to intractable cases involving widespread hair loss). Ritlecitinib has also received a positive opinion in the EU and is under regulatory review in the UK and China. This article summarizes the milestones in the development of ritlecitinib leading to this first approval for severe alopecia areata.
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