TNF-alpha inhibitors biosimilar use in France: a nationwide population-based study using the French National Health Data System.

Sci Rep

EPI-PHARE, French National Agency for Medicines and Health Products Safety (ANSM) and French National Health Insurance (CNAM), 143-147 Boulevard Anatole France, 93285, Saint-Denis, France.

Published: November 2022

AI Article Synopsis

  • TNF-alpha inhibitors have significantly changed treatment for chronic inflammatory diseases, with biosimilars emerging after patent expirations, reducing costs.
  • A study analyzed the adoption rates of infliximab, etanercept, and adalimumab biosimilars in France, including over 207,000 patients from their market introduction through September 2021.
  • The findings showed that biosimilars accounted for a high percentage of new initiations (up to 94% for infliximab), but the switch from originator products was relatively low, especially in specialties like rheumatology, indicating a need for ongoing monitoring and policy initiatives.

Article Abstract

TNF-alpha inhibitors have revolutionized the therapeutic care in chronic inflammatory diseases. Several biosimilar products were commercialized at their patent expiry, substantially decreasing the cost of treatment. This longitudinal descriptive study aimed at assessing infliximab, etanercept and adalimumab biosimilar penetration rates using data of the French National Health Data System. A total of 207,118 new or prevalent users from the date of first biosimilar commercialization in France (respectively January 2015, May 2016 and October 2018) were included in the study and followed until September 30, 2021. Biosimilars represented respectively 78%, 46% and 53% of the overall initiations, and 94%, 66% and 60% last year's initiations. A total of 46%, 19% and 17% of originator product prevalent users switched for a biosimilar during the follow-up. Biosimilar penetration rate was much higher for infliximab than for its counterparts, due to its hospital delivery modality. Biosimilar initiation and originator-to-biosimilar switch tended to be observed more in rheumatology than in the other specialties. Biosimilar use was mostly consistent across patient socio-demographic characteristics. Biosimilar initiation rate increased rapidly from their market arrival and originator-to-biosimilar switch rate remained moderate, highlighting the need and usefulness of political action and biosimilar use tracking.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9666557PMC
http://dx.doi.org/10.1038/s41598-022-24050-7DOI Listing

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