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In this ongoing phase 3 study, ritlecitinib demonstrated sustained efficacy up to 24 months in patients aged 12 or older with alopecia areata, showing increased response rates with or without an initial loading dose and supporting its long-term use.

The trial is ongoing, but researchers are evaluating the efficacy and safety of REZPEG, a potential new therapy for severe alopecia areata, which selectively expands regulatory T cells.

This study found that some patients with alopecia areata who did not respond to ritlecitinib treatment by Week 24 achieved a positive response with continued therapy by Week 48, with tolerable side effects.

This study found that in Asian patients aged 12 and older with alopecia areata and significant hair loss, ritlecitinib showed clinical efficacy in improving hair regrowth and eyebrow and eyelash scores over 48 weeks, with an acceptable safety profile observed throughout.

This study found that ritlecitinib improved patient-reported outcomes related to hair growth in individuals with alopecia areata, with some experiencing clinically meaningful hair regrowth, although changes in emotional symptoms and activity limitations were minimal and similar across treatment groups.