A Phase 3, External and Synthetic Placebo-controlled Randomized Study with Dose-up for Non-responders to Investigate Safety and Efficacy of Ritlecitinib 50 mg and 100 mg Once Daily in Adult and Adolescent Participants 12 Years of Age and Older with Alopeica Areata
Study Description
Ritlecitinib is approved in many countries at a dose of 50 mg (milligram) taken by mouth once a day for the treatment of patients 12 years and older with severe alopecia areata. This study will look at both the 50 mg dose and a 100 mg dose.
Brief Summary
The purpose of the study is to learn about the safety and effects of the study medicine (called ritlecitinib) for the treatment of alopecia areata. Alopecia areata is a disease that causes hair loss on the scalp, face, and areas of the body.
Condition or Disease
Alopecia Areata
Study Design
| Study Type: | Interventional (Clinical Trial) |
| Estimated Enrollment: | 550 |
| Primary Outcome Measures |
1. Percentage of participants with absolute Severity of Alopecia Tool (SALT) score less than or equal to 20
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| Actual Study Start Date: | April 2025 |
| Estimated Primary Completion Date: | March 2027 |
Eligibility Criteria
| Ages Eligible for Study: | 12 Years Old & Older |
| Sexes Eligible for Study: | All |
| Accepts Healthy Volunteers: | No |
Study Population
Alopecia Areata
Inclusion Criteria
- Must meet the following alopecia areata criteria at both Screening and Baseline: ave a clinical diagnosis of alopecia areata with no other etiology of hair loss, â„50% hair loss of the scalp, as measured by SALT, without evidence of terminal hair regrowth within the previous 6 months, Current episode of hair loss â€10 years
Exclusion Criteria
- Diseases or conditions other than alopecia areata which affect hair loss, including other types of alopecia, other scalp disease that may impact the alopecia areata assessment, or active systemic diseases that may cause hair loss
- History of severe allergic or anaphylactoid reaction to any kinase inhibitor or a known allergy/hypersensitivity to any component (including excipients) of the study intervention
- Any psychiatric condition including recent or active suicidal ideation or behavior that meets protocol-defined criteria
- Have a history of systemic infection requiring hospitalization or parenteral therapy (antimicrobial, antiviral, antiparasitic, antiprotozoal, or antifungal), or as otherwise judged clinically significant by the investigator, within 3 months prior to Day 1
- Have active acute or chronic infection requiring treatment with oral antibiotics, antivirals, antiparasitics, antiprotozoals, or antifungals within 4 weeks prior to Day 1. NOTE: participants may be rescreened after the infection resolves
- Evidence or history of untreated, currently treated or inadequately treated active or latent infection with Mycobacterium tuberculosis
- History (single episode) of disseminated herpes zoster or disseminated herpes simplex, or a recurrent (more than one episode of) localized, dermatomal herpes zoster.