Jiu Jiang Shi

Psoriatic arthritis PsA is a long-lasting inflammatory condition affecting joints and skin in people with psoriasis. This trial evaluates how well the drug zasocitinib TAK-279 works in adults with active PsA, focusing on participants past experiences with certain treatments. The study is a phase 3 clinical trial designed to assess treatment effectiveness and safety. Participants will be randomly assigned to one of three groups one receiving zasocitinib Dose A tablets once daily for up to 52 weeks, another receiving zasocitinib Dose B tablets once daily for up to 52 weeks, and a third group receiving a placebo once daily for 16 weeks followed by either Dose A or Dose B of zasocitinib once daily through week 52. This design allows comparison of doses and placebo effects during the early treatment period. During the study, participants will undergo regular assessments including joint counts and skin evaluations to monitor disease activity and response to treatment. Researchers will measure the percentage of participants achieving specific response criteria such as the American College of Rheumatology 20 ACR20 response at week 16. Safety and other health outcomes like fatigue, physical function, and quality of life will also be tracked. Total participation can last up to 60 weeks, including treatment and follow-up periods.