Alimentary TractTacrolimus induction followed by maintenance monotherapy is useful in selected patients with moderate-to-severe ulcerative colitis refractory to prior treatment

BackgroundTacrolimus in refractory ulcerative colitis often serves as a bridge to long-term maintenance therapy with thiopurines. Our aim was to review efficacy and safety of tacrolimus in active ulcerative colitis resistant to conventional therapies, including anti-tumour necrosis factor.MethodsCharts of consecutive outpatients with refractory ulcerative colitis, in whom tacrolimus was orally administered as a 12 week-induction (target trough levels 10-15 ng/mL) followed by a maintenance therapy (target trough levels 5-10 ng/mL), were retrospectively reviewed. Clinical remission and response at weeks 4, 12 and 52 as well as adverse events within 1-year therapy were reported.ResultsTwelve (40%) and six (20%) of the 30 patients included (14 males, mean age 37.1 ± 1.4 years) achieved a clinical remission and response, respectively, at week 12. Three responders to tacrolimus initiation experienced drug-related adverse events requiring discontinuation. Among the 18 remaining initial responders who tolerated tacrolimus, 8 (27%) were in clinical remission at week 52, whereas the remainder either experienced adverse events requiring drug withdrawal (n = 4) or relapsed (n = 6). Overall adverse events were recorded in 14 patients (46%), mainly finger tremor and urinary infections.ConclusionOral monotherapy with tacrolimus may be a valuable long-term therapeutic option in selected patients with moderate-to-severe active refractory ulcerative colitis.