Used in research for the treatment of autoimmune and inflammatory diseases, particularly psoriasis and atopic dermatitis. It functions as a selective inhibitor of tyrosine kinase 2 (TYK2), a key enzyme in the JAK-STAT signaling pathway involved in immune responses. By modulating this pathway, it helps reduce the production of pro-inflammatory cytokines without broadly suppressing the immune system. Its targeted mechanism offers potential for improved safety compared to pan-JAK inhibitors. Currently under investigation in clinical trials to evaluate efficacy, dosing, and long-term safety in chronic inflammatory conditions.