Does the new hair loss drug work outside the lab?

This study aims to see how well the medication ritlecitinib works for people with severe alopecia areata (an autoimmune condition causing hair loss) in real-world medical settings. It will look back at the medical records of about 300 people in the U.S. who were prescribed this drug to understand who uses it and what their hair regrowth results are. The goal is to learn how effective the treatment is in everyday practice, not just in controlled clinical trials.