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Considerable controversy related to the cardiovascular safety of Janus kinase inhibitors (JAKinibs) has arisen following the results of the ORAL Surveillance trial. In this trial of rheumatoid arthritis (RA) ≥ 50 years with at least one prevalent cardiovascular disease (CVD) risk factor, tofacitinib was not found to be non-inferior to tumour necrosis factor-alpha inhibitors (TNFi) with regards to the risk for major adverse cardiovascular events (MACE), venous thromboembolism (VTE) or malignancy. Following the results of ORAL Surveillance, the United States Food and Drug Administration (US FDA) issued a boxed warning regarding increased risks of MACE, VTE and malignancy with tofacitinib, baricitinib or upadacitinib in inflammatory arthritis or ulcerative colitis. Analysis of data from other trials (including long-term follow-up studies) of tofacitinib in RA, psoriasis, psoriatic arthritis, spondyloarthritis and inflammatory bowel diseases suggests an overall similar risk of MACE or VTE with tofacitinib when compared with TNFi. In specific patient populations with risk factors for or prior history of MACE or VTE, the risk of subsequent MACE or VTE with tofacitinib use is considerably heightened. Post-hoc analyses from ORAL Surveillance presented at the recent EULAR meeting further help to delineate patients with RA at increased risk of MACE/VTE with tofacitinib. Based on the available literature from trials and long-term follow-up studies of baricitinib and upadacitinib, there exists insufficient evidence to extend the warning of MACE/VTE with tofacitinib to these drugs. Ongoing post-marketing surveillance studies of JAKinibs in immune-mediated inflammatory diseases should help clarify CVD risk with JAKinibs. |
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