The European Commission has approved ritlecitinib to treat adults and adolescents 12 years of age and older with severe alopecia areata. Ritlecitinib is a dual inhibitor of the TEC family of tyrosine kinases and of Janus kinase 3. According to results from ALLEGRO-LT phase 3 trial, the most common adverse reactions included diarrhea (9.2%), acne (6.2%), URTI (6.2%), urticaria (4.6%), rash (3.8%), folliculitis (3.1%), and dizziness (2.3%).