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Thank you for the interest in our publication based on data from the Danish DANBIO registry regarding 2061 patients who were eligible for a mandatory non-medical switch from originator to biosimilar etanercept in routine care.1 2 The marketing of biosimilars has changed the landscape of the biological drugs with the potential for huge cost reductions, most markedly if patients may be switched from an ongoing successful treatment with the expensive originator to a much cheaper biosimilar. Thus, up to 75% price reduction has been experienced in Denmark so far with no evidence of increased use of health resources.3 The outcomes of a non-medical switch of etanercept in the real-world setting are, however, largely unknown, since prevous publications on switching in routine care have included limited numbers of patients. The aim of the study was therefore to investigate the effectiveness of a large-scale, …
Handling editor Josef S Smolen
Contributors All authors contributed to and approved this letter to the editor.
Funding This article is funded by the Research to Prevent Blindness (New York, New York) (grant number 1602760177).
Competing interests BG: AbbVie, Biogen, Pfizer, MSD. MLH: Orion, BMS, AbbVie, Biogen, Pfizer, MSD, Celltrion. IMJH: Roche. AGL: AbbVie, MSD, Novartis, Pfizer, Roche, UCB. OH: AbbVie, Roche, Novartis. HN: AbbVie, Novartis, Medac. LSA: Pfizer.
Patient consent for publication Not required.
Provenance and peer review Commissioned; internally peer reviewed.