Long-term safety and tolerability of oral tofacitinib in patients with Crohn’s disease: results from a phase 2, open-label, 48-week extension study.

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Long-term safety and tolerability of oral tofacitinib in patients with Crohn’s disease: results from a phase 2, open-label, 48-week extension study.

Aliment Pharmacol Ther. 2019 Feb;49(3):265-276

Authors: Panés J, D’Haens GR, Higgins PDR, Mele L, Moscariello M, Chan G, Wang W, Niezychowski W, Su C, Maller E

Abstract
BACKGROUND: Tofacitinib is an oral, small molecule Janus kinase inhibitor that is being investigated for inflammatory bowel disease.
AIMS: This 48-week open-label extension study primarily investigated long-term safety of tofacitinib 5 and 10 mg b.d. and secondarily investigated efficacy as maintenance therapy in patients with Crohn’s disease.
METHODS: Patients who had completed the phase 2b maintenance study, or withdrawn due to treatment failure, were enrolled. Patients in remission (Crohn’s disease activity index <150) at baseline received tofacitinib 5 mg b.d.; all others received 10 mg b.d. A single dose adjustment was allowed after 8 weeks’ fixed, open-label treatment.
RESULTS: Sixty-two patients received tofacitinib 5 mg b.d.; 88 received 10 mg b.d. Both groups had similar rates of adverse events and serious infections. Crohn’s disease worsening was the most frequent adverse event for tofacitinib 5 (33.9%) and 10 mg b.d. (19.3%). Patients not in remission at baseline, receiving 10 mg b.d., had higher rates of serious adverse events (19.3%) and discontinuation attributed to insufficient clinical response (30.7%) vs 5 mg b.d. (8.1% and 9.7%, respectively). At week 48, of patients with baseline remission receiving 5 mg b.d., 87.9% maintained remission and 75.0% sustained remission as observed (46.8% and 38.7%, respectively, by non-responder imputation). Study design prevented between-dose efficacy comparisons.
CONCLUSIONS: No new safety signals emerged. Although both doses showed generally similar safety outcomes for overall adverse events, serious adverse events were more frequent for tofacitinib 10 than 5 mg b.d. Discontinuation due to insufficient clinical response was lower among patients in remission at baseline. ClinicalTrials.gov: NCT01470599.

PMID: 30663107 [PubMed – in process]

PubMed Link: https://www.ncbi.nlm.nih.gov/pubmed/30663107?dopt=Abstract