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 ALOPECIA AREATA

Ritlecitinib (LITFULO™, PF-06651600) 50 mg daily is currently approved for people 12 years of age and older to treat severe alopecia areata (hair loss). Ritlecitinib 100 mg will be compared to Ritlecitinib 50 mg to find out if a larger daily dose is safe and can improve regrowth of hair. The study will last about 57 weeks and will have up to 9 visits. Everyone will get one of the two doses of the study drug.