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  • Title: Reasons for Discontinuation and Adverse Effects of TNFα Inhibitors in a Cohort of Patients With Rheumatoid Arthritis and Ankylosing Spondylitis.
    Author: García-Lagunar MH, Gutiérrez-Cívicos MR, García-Simón MS, Conesa-Zamora P, Jimenez-Santos E, Cano-Vivar P, García-Márquez A, Muñoz-García I, Viney AC.
    Journal: Ann Pharmacother; 2017 May; 51(5):388-393. PubMed ID: 27920336.
    Abstract:
    BACKGROUND: The introduction of anti-tumor necrosis factor α (anti-TNFα) drugs has improved the clinical outcomes in rheumatoid arthritis (RA) and ankylosing spondylitis (AS). However, these drugs may cause adverse effects that motivate a change in or discontinuation of the treatment. OBJECTIVE: To evaluate the causes of discontinuation or changes in the dosage regimen in a cohort of patients with RA and AS treated with infliximab, adalimumab, etanercept, and golimumab under clinical practice conditions. METHODS: This was a retrospective observational study that included patients with RA or AS treated with anti-TNFα drugs between 2008 and 2013. Changes in the dosage regimen, reasons for treatment discontinuation, and adverse effects were recorded and analyzed. Time to discontinuation was estimated using Kaplan-Meier survival analysis. RESULTS: A total of 123 patients with RA and 93 patients with AS were treated with anti-TNFα therapy. During the study, 55.3% of RA patients and 41.7% of AS patients had stopped the treatment. The most frequent changes were modifications in the dosing, and the most frequent adverse effects were reactions after the infusion or injection (53.8% and 66.7% in RA and AS, respectively). Drug survival of etanercept in RA (67.9%) is greater than for adalimumab and infliximab, whereas drug survival of infliximab in AS (70.0%) is greater than for etanercept and adalimumab at 5 years, although there were no significant differences ( P = 0.098 in RA and 0.194 in AS). CONCLUSIONS: The main cause of discontinuation of anti-TNFα is therapeutic failure in both diseases. Etanercept and infliximab have the best survival rates in RA and AS, respectively.
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