Ustekinumab: A Review in Moderate to Severe Crohn's Disease.

Ustekinumab (Stelara) has been recently approved in the EU and the USA as intravenous induction and subcutaneous maintenance therapy for adult patients with moderately to severely active Crohn's disease who have failed or were intolerant to treatment with immunomodulators, corticosteroids or at least one tumour necrosis factor (TNF) antagonist. Ustekinumab, a monoclonal antibody to the shared p40 subunit of the proinflammatory interleukin (IL)-12 and IL-23 cytokines, has a unique mechanism of action distinct from that of TNF antagonists. In pivotal phase III trials, compared with placebo, ustekinumab induction therapy improved clinical response and remission rates in patients who had previously failed or were intolerant to conventional therapies or at least one TNF antagonist. When administered as subcutaneous maintenance therapy, ustekinumab continued to offer benefits over placebo for clinical response and remission in patients who had clinically responded to the induction therapy. Ustekinumab was generally well tolerated as both induction and maintenance therapy; serious infections and malignancies were rare. Thus, ustekinumab presents a promising alternative treatment option in patients with moderately to severely active Crohn's disease who have failed or are intolerant to treatment with conventional therapies or TNF antagonists.