Lancaster

Researchers are evaluating the efficacy of dotinurad compared with allopurinol in lowering serum uric acid sUA levels in adults with tophaceous gout. This Phase 3 trial focuses on adult participants aged 18 to 75 years who have measurable tophi and a diagnosis of gout for at least one year. The study aims to assess how well dotinurad reduces sUA levels at Week 24 compared to allopurinol, an established treatment for this condition. Participants are randomly assigned to one of two treatment groups. One group will stop their current allopurinol and continue with study-supplied allopurinol once daily through Week 76. The other group will discontinue allopurinol and start dotinurad at 1 mg daily for the first 4 weeks, then increase to 2 mg daily for the next 8 weeks, and finally 4 mg daily thereafter until Week 76. Both treatments are given as oral tablets, and participants are closely monitored throughout the study. During the study, participants will undergo various assessments including blood tests to measure serum uric acid levels at multiple time points, evaluation of tophi response, and tracking of gout flare frequency and severity. Safety monitoring will include recording any adverse events and serious side effects up to Week 80. The main outcome measures focus on the percentage of participants achieving target sUA levels at Week 24 and clinical responses in tophi at Week 76, with ongoing evaluations up to Week 80 to assess longer-term effects and safety.