Topical tacrolimus in the treatment of perianal Crohn's disease: Exploratory randomized controlled trial

Abstract

Background: The aim of this study is to evaluate the efficacy of topical tacrolimus in treating perianal Crohn's disease. Methods: Nineteen patients, stratified into 7 with ulcerating, and 12 with fistulizing, perianal Crohn's disease were randomized to topical tacrolimus 1 mg/g (1 g ointment twice a day [bid]) or placebo for 12 weeks. Sixteen patients had been on, or were currently taking, azathioprine/6-MP, and 6 had received infliximab. The primary outcome in ulcerating disease was global improvement in perianal/anal lesions, as assessed by the attending physician; for fistulas, it was reduction of ≥50% of actively draining fistulas on 2 consecutive visits. Blood tacrolimus levels and adv..