The safety and efficacy of tofacitinib in Crohn's disease (CD) has been studied in 2 phase II trials in patients with moderate-to-severe CD with no new safety signals observed, but no significant difference from placebo in the primary efficacy endpoint of clinical response.1-3 However, post hoc analyses and smaller studies have observed clinical and biologic response to tofacitinib in patients with CD.2,4,5 There is a paucity of real-world effectiveness and safety data for tofacitinib in non-Food and Drug Administration label usage in patients with CD and patients with inflammatory bowel disease-unclassified (IBD-U).
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