AB0272 Switching from Etanercept original to Etanercept biosimilar. EXPERIENCE IN A TERTIARY HOSPITAL.

Abstract

Background:With the arrival of biosimilar drugs and savings policies to make the health system sustainable, hospital managers have chosen to make changes from original molecules to biosimilar drugs.Objectives:This work aims to reflect what happens when making these switchings.Methods:We reviewed 235 patients who started Etanercept original in Rheumatology at Navarra Hospital Complex and Henares University Hospital and their switch to Etanercept biosimilar with a follow-up of 6 months.Results:The switch was performed in 174 patients with psoriatic arthritis (PsA), rheumatoid arthritis (RA), ankylosing spondylitis (AS), juvenile idiopathic arthritis, SAPHO and spondyloarthritis.9.8% discontinued treatment: 6 RA (8.1%), 5 PsA (9.8 %) and 6 AS (20.7%); all of them in the injection presentation. 12 patient stopped treatment due to ineffecacy, 2 due to reaction at the injection site, 2 due to diarrhea and 1 due to headache. Among 88.2% of patients who returned to Etanercept original, 28.6% did not achieve good response and had to change of treatment. The median time from Etanercept original beginning until the moment of switching was 54 (40-87) months.Conclusion:In our series, approximately 10% of switching patients failed after a 6-month of follow-up; when trying to return to Etanercept original 28.6% did not achieve response.The median persistence time in the original molecule and the percentage of failures observed in AS could be two conditions to consider before switching.A longer-term follow-up and a greater number of patients are necessary to ratify these data.Table 1DISEASESTOPPED CAUSEBACK TO Etanercept originalCONTINUE Etanercept originalTIME UNTIL SWITCH (meses)ASReaction at the injection siteYesYes28ASHeadacheYesYes54ASIneffecacyYesYes126RAIneffecacyYesNo25ASDiarrheaYesYes87RAIneffecacyYesYes37PsAIneffecacyNoNo43RAIneffecacyYesYes54PsAIneffecacyYesNo93PsAIneffecacyNoNo132PsAIneffecacyYesYes62RAIneffecacyYesYes142RAReaction at the injection siteYesYes51RAIneffecacyYesNo56PsAIneffecacyYesNo40ASIneffecacyYesYes26ASDiarrheaYesYes48Disclosure of Interests:Vicente Aldasoro Speakers bureau: Roche, Abbvie, MSD, UCB, Pfizer, Menarini, Grunenthal, Gebro, Novartis, Janssen, Javier Mendizabal: None declared, Sara Perez Garcia: None declared, Guillen Sada Urmeneta: None declared, Juliana Restrepo Vélez: None declared, Natividad del Val del Amo: None declared, Inmaculada Paniagua Zudaire: None declared, Ricardo Gutiérrez Polo: None declared, Loreto Horcada: None declared, Laura Garrido Courel: None declared, C. Fito-Manteca: None declared