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Uptake of tumour necrosis factor-alpha inhibitor biosimilars for psoriasis: a drug utilization study from the British Association of Dermatologists Biologic and Immunomodulators Register (BADBIR).
Phan, Duc Binh; Bewley, Anthony P; Smith, Catherine H; Mackenzie, Teena; Griffiths, Christopher E M; Lunt, Mark; Warren, Richard B; Yiu, Zenas Z N.
Afiliação
  • Phan DB; Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK.
  • Bewley AP; Department of Dermatology, Barts Health NHS Trust and Queen Mary College (University of London), London, UK.
  • Smith CH; King's College London and St John's Institute of Dermatology, Guy's & St Thomas' NHS Foundation Trust, London, UK.
  • Mackenzie T; Royal Berkshire NHS Foundation Trust, Reading, UK.
  • Griffiths CEM; Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK.
  • Lunt M; Centre for Epidemiology Versus Arthritis, The University of Manchester, Manchester, UK.
  • Warren RB; Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK.
  • Yiu ZZN; Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK.
Br J Dermatol ; 189(1): 62-70, 2023 07 07.
Article em En | MEDLINE | ID: mdl-37016153
ABSTRACT

BACKGROUND:

Tumour necrosis factor-alpha inhibitors (TNFi) have revolutionized the treatment of moderate-to-severe psoriasis. Following patent expiry of the originator biologics, TNFi biosimilars became available, presenting the opportunity for significant reductions in drug costs.

OBJECTIVES:

To describe the uptake of TNFi biosimilars for psoriasis treatment in the UK and Ireland.

METHODS:

This observational cohort study utilizes data from the British Association of Dermatologists Biologic and Immunomodulators Register (BADBIR), a national pharmacovigilance study register for patients with psoriasis on systemic treatments. We analysed biosimilar uptake trends over time in nine geographical regions of England along with Wales, Scotland, Northern Ireland and the Republic of Ireland. We assessed the incidence of switching to biosimilars in an originator-user cohort (switchers). Patients on originators infliximab, etanercept and adalimumab at the time originator patents expired, entered the cohort on 1 February 2015, August 2015 and October 2018, respectively, and were followed up until 31 October 2021. Trends in biosimilar initiations were assessed in an adalimumab-naïve cohort who started adalimumab between 1 October 2018 and 31 July 2019 (starters). We assessed the associations between patient factors and originator-to-biosimilar switching and biosimilar initiation using a multivariable Cox regression model and a multivariable logistic regression model, respectively.

RESULTS:

Included in the originator-user cohort were 4202 patients (209 on infliximab, 742 on etanercept and 3251 on adalimumab). For infliximab, etanercept and adalimumab, respectively, the cumulative incidence of originator-to-biosimilar switching increased with time to 14.8%, 23.6% and 66.6% after 3 years. Across geographical regions, 3-year switching rates varied from 0% to 43.7% for infliximab; from 0% to 40.4% for etanercept; and from 12.5% to 84.3% for adalimumab. Out of the 528 patients included in the adalimumab-naïve cohort, 67.8% started on biosimilars. Originator-to-biosimilar switching and biosimilar initiation were more common in men and in patients who had lower Psoriasis Area and Severity Index at cohort entry.

CONCLUSIONS:

The uptake of biosimilars increased over time and varied considerably across the UK and Ireland; adalimumab had the highest biosimilar uptake rate compared with that of other TNFi drugs.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Psoríase / Medicamentos Biossimilares Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Psoríase / Medicamentos Biossimilares Idioma: En Ano de publicação: 2023 Tipo de documento: Article