427 Long-term 4-year safety of upadacitinib in moderate-to-severe atopic dermatitis: results of an integrated analysis of phase 3 studies (2023)

Abstract Atopic dermatitis (AD) is a chronic, inflammatory skin disease characterized by intense itch and eczematous skin lesions that can impact individuals at any age across any area of the body. There is a need for safe treatments for AD that provide rapid itch relief and skin clearance and that are suitable for long-term use. Upadacitinib is a selective, reversible oral Janus kinase 1 (JAK1) inhibitor, which is approved in multiple countries for the treatment of adolescents and adults with moderate-to-severe AD. The current analysis assessed the long-term safety for up to 4 years of upadacitinib 15 and 30 mg in adolescents and adults with moderate-to-severe AD, using integrated data from three ongoing global pivotal phase 3 studies. The Measure Up 1, Measure Up 2, and AD Up studies are ongoing pivotal phase 3, randomized, placebo-controlled, multicenter studies evaluating the safety and efficacy of upadacitinib 15 mg and upadacitinib 30 mg in adolescents and adults with moderate-to-severe AD. Patients were randomized 1 : 1 : 1 to receive oral upadacitinib 15 mg, upadacitinib 30 mg or placebo once daily alone (Measure Up 1 and Measure Up 2) or with concomitant topical corticosteroids (AD Up). At Week 16, patients receiving upadacitinib 15 or 30 mg during the double-blinded period continued their assigned treatment in the blinded extension (BE) period, whereas patients receiving placebo were re-randomized 1 : 1 to receive either upadacitinib 15 or 30 mg in the BE period (upadacitinib treatment for up to 260 weeks). A total of 2693 adults and adolescents (upadacitinib 15 mg, 1340; upadacitinib 30 mg, 1353) who received at least one dose of upadacitinib were included in the integrated analysis. Treatment-emergent adverse events of special interest (AESI) were analysed as exposure-adjusted rates per 100 patient-years (PY) for the entire treatment period to adjust for potentially different durations of follow-up. Upadacitinib was well tolerated by both adults and adolescents. For all patients, rates of AESIs were similar at the 1-year analysis and up to 4-year analysis for upadacitinib (15 mg/30 mg) for: serious infections, 2.3 and 2.2/2.8 and 2.8; opportunistic infections, 1.6 and 1.8/1.9 and 2.4; active tuberculosis, &amp;lt;0.1/&amp;lt;0.1 at both time points; herpes zoster, 3.5 and 3.1/5.2 and 5.8; nonmelanoma skin cancer (NMSC), 0.3 and 0.4/0.4 and 0.3; malignancy excluding NMSC, 0.1 and 0.4/0.5 and 0.3; and adverse events leading to death, 0 and 0/&amp;lt;0.1 and &amp;lt;0.1. Rates of adjudicated major adverse cardiovascular events (MACE) were 0.1 and &amp;lt;0.1/&amp;lt;0.1 and &amp;lt;0.1, and for venous thromboembolic events (VTE) were &amp;lt;0.1 for both doses at the 1-year analysis and up to 4-year analysis. Rates of gastrointestinal perforations were 0 for both doses at both timepoint analyses. Rates of serious infections remain low (&amp;lt;3.0 E/100 PY). Based on the integrated analysis of long-term safety data for up to 4 years, rates of AESIs remained low throughout a longer duration of treatment with upadacitinib 15 or 30 mg among adults and adolescents with moderate-to-severe AD. No new safety risks were observed. Findings of the current safety analysis continue to support a favorable benefit-risk profile of upadacitinib in the treatment of adults and adolescents with moderate-to-severe AD for up to 4 years of treatment.