A Phase III Trial of HMPL-004 in Patients With Mild to Moderate Active Ulcerative Colitis

This Phase III study of HMPL-004 was to enroll approximately 420 subjects with active mild to moderate ulcerative colitis (UC; modified Mayo Score 4-10 and endoscopy score of 2-3). The trial included male and female subjects aged 18 or older. Subjects were currently receiving ≥2.4 g/day mesalamine or equivalent, provided they had taken 5-aminosalicylate (ASA; i.e., mesalamine) at a dose ≥2.4 g/day for at least 6 weeks prior to randomization and were on a stable dosage for at least 2 weeks prior to entering the screening phase of the study. Qualifying subjects who entered into this study received 3 daily doses of oral HMPL 004 tablets or placebo for 56 days (8 weeks). There were 3 arms in this study consisting of placebo, HMPL-004 600 mg three times a day (TID) or 800 mg TID. Approximately 420 subjects were to be randomized 1:1:1 to one of these 3 arms, stratified by country/region in up to 150 clinical centers in North America, Europe, and Asia.