The switch included patients with rheumatoid arthritis and psoriatic arthritis who were treated at a single center in Amsterdam, the Netherlands.
The body of literature on switching form reference infliximab to biosimilar CT-P13 continues to grow, and this month, a new paper, appearing in the International Journal of Rheumatic Diseases, added new findings from a real-world switch conducted in the Netherlands.
The switch included patients with rheumatoid arthritis (RA) and psoriatic arthritis (PsA) who were treated at a single center in Amsterdam, the Netherlands. In total, 47 patients were approached about switching via a letter and follow-up contact from a nurse or pharmacist. Communication about the switch followed the standards of the Dutch Association of Hospital Pharmacists.
Eventually, 45 patients—41 of whom had RA and 4 of whom had PsA—agreed to the switch and received CT-P13 at their next infusion. Concomitant methotrexate was taken by 69% of the patients.
The primary outcome of the study was the percentage of patients continuing treatment with the biosimilar at 2 years. Disease Activity Score in a count of 28 joints with erythrocyte sedimentation rate (DAS28-ESR) at 1 year was a secondary outcome. Each patient who switched was also asked to complete a qualitative questionnaire about the quality of information they received.
The last available mean (SD) DAS28‐ESR score prior to the transition was 2.34 (1.02). At 1 year after the switch, the mean (SD) DAS28‐ESR score was 2.31 (1.1).
At the end of 2 years, a total of 39 patients (87%) were still using CT-P13. Two patients switched to different anti—tumor necrosis factor therapies (1 to etanercept and 1 to adalimumab) because of inefficacy. Both of these patients had high DAS28-ESR scores at the time of the switch. One patient discontinued infliximab due to a malignancy. A total of 3 patients switched back to the reference infliximab. Among these 3 patients, at 2 years, 1 patient had discontinued the reference due to a malignancy, and 1 had switched to abatacept due to increased disease activity.
All 45 patients completed the questionnaire, and 15 (33%) said that the information they received about the switch was excellent, 24 (54%) said that it was good, 4 (9%) said that it was reasonable, and 2 (4%) said that it was sufficient. No patients said that the information provided was insufficient.
According to the study’s authors, the quality of the information provided—and the satisfaction of the patients with that information—may have contributed to the success of the switch and to the low discontinuation rates that were observed at 2 years.
Reference
Layegh Z, Ruwaard J, Hebing RCF, et al. Efficacious transition from reference infliximab to biosimilar infliximab in clinical practice. Int J Rheum Dis. 2019;22(5):969-873. doi: 10.1111/1756-185X.13512.
Samsung Bioepis Report Signals Turning Point for US Biosimilars
May 1st 2025A wave of biosimilar approvals, aggressive pricing strategies, and a regulatory sea change are setting the stage for unprecedented momentum in the US biologics market, with 2025 already proving to be a landmark year in reshaping cost, access, and innovation across therapeutic areas.
Breaking Barriers in Osteoporosis Care: New Denosumab Biosimilars Wyost, Jubbonti Approved
June 16th 2024In this episode, The Center for Biosimilars® delves into the FDA approval of the first denosumab biosimilars, Wyost and Jubbonti (denosumab-bbdz), and discuss their potential to revolutionize osteoporosis treatment with expert insights from 2 rheumatologists.
Eye on Pharma: Sandoz Files Antitrust Suit; Yuflyma Interchangeability; Costco’s Ustekinumab Pick
April 22nd 2025Sandoz's antitrust suit against Amgen, the FDA’s interchangeability designation for Celltrion’s adalimumab biosimilar, and the inclusion of an ustekinumab biosimilar in Costco’s prescription program highlight growing momentum to expand biosimilar access and affordability for patients with chronic inflammatory diseases.
Insights from Festival of Biologics: Dracey Poore Discusses Cardinal Health’s 2024 Biosimilar Report
May 19th 2024The discussion highlights key emerging trends from the Festival of Biologics conference and the annual Cardinal Health Biosimilars Report, including the importance of sustainability in the health care landscape and the challenges and successes in biosimilar adoption and affordability.
Early Success of Adalimumab Biosimilars Featured at AMCP 2025
April 5th 2025High adherence rates, comparable clinical effectiveness, and cost savings have marked the early adoption of adalimumab biosimilars in the US, particularly in formulary-driven transitions, as shown in 2 retrospective studies presented at the Academy of Managed Care Pharmacy annual meeting (AMCP 2025).