Abivax SA has reported efficacy in a Phase 2b trial of a small molecule treatment for ulcerative colitis, paving the way for the start of a Phase 3 programme by the end of the year. Patients in the placebo-controlled trial had moderate to severe colitis and included individuals refractory to conventional drugs including biologics and/or JAK inhibitors. Significantly, the lowest dose of 25 mg was effective across the entire study population, the company announced on 24 May.