Lancaster

Researchers are evaluating the effectiveness of dotinurad compared to allopurinol in lowering serum uric acid (sUA) levels at 24 weeks in adults with tophaceous gout. This condition involves the presence of measurable tophi, or deposits of uric acid crystals, in joints such as hands, wrists, feet, or ankles. The study is a Phase 3, randomized, double-blind, multicenter trial focused on adults aged 18 to 75 years who have had gout for at least one year. Participants receive either dotinurad or allopurinol in over-encapsulated tablet form, taken orally. The treatments are compared to see which better lowers sUA levels below 5.0 mg/dL after 24 weeks. The study includes a screening period before treatment begins, during which eligibility is confirmed, including measurements of tophi size and uric acid levels. During the study, participants will have regular assessments to monitor serum uric acid levels and the size of tophi. Safety and side effects will also be monitored throughout the 24-week treatment period. The main outcome is the percentage of participants who achieve sUA levels less than 5.0 mg/dL at week 24, helping to understand the comparative efficacy and safety of the two medications.