Study of Zasocitinib Treatment in Adults With Active Psoriatic Arthritis Who Have Not Used Biologic Medicines

What this Trial Is About

Psoriatic arthritis PsA is a chronic inflammatory condition that affects the joints and skin in people with psoriasis. This study aims to evaluate how well zasocitinib TAK-279 works in adults with active PsA who have not previously been treated with biologic disease-modifying antirheumatic drugs. The trial is a Phase 3, randomized, double-blind study comparing zasocitinib with an active comparator and placebo. Participants will be assigned to one of four groups zasocitinib Dose A once daily, zasocitinib Dose B once daily, an active comparator capsule twice daily, or placebo once daily for 16 weeks followed by switching to zasocitinib Dose A or B up to 52 weeks. Treatments are taken orally as tablets or capsules over a period of up to 60 weeks. During the study, participants will undergo regular assessments including joint counts, skin evaluations, and various disease activity measurements such as ACR20 and PASI-75 responses. Researchers will monitor changes from baseline in functional and quality of life scores, as well as safety and tolerability. Participants will be involved in visits throughout the treatment period to evaluate the effects and collect data on the disease and treatment responses.

A Study of Zasocitinib in Adults With Psoriatic Arthritis Who Have Not Taken Biologic Medicines