Used in the treatment of autoimmune diseases such as psoriasis and rheumatoid arthritis. It functions as a selective inhibitor of tyrosine kinase 2 (TYK2), which plays a key role in the signaling pathways of pro-inflammatory cytokines like IL-12, IL-23, and type I interferons. By blocking TYK2 activity, the compound helps reduce inflammation and immune system overactivity. It is taken orally and designed for targeted action, minimizing broader immunosuppressive effects commonly seen with other kinase inhibitors. Currently under investigation in clinical trials for efficacy and safety in chronic inflammatory conditions.