Assessing gastroenterologist and patient acceptance of biosimilars in ulcerative colitis and Crohn's disease across Germany

Objectives This study examined gastroenterologists' motivation for prescribing biosimilars, assessed their treatment preferences in relation to prescribing behaviour, and explored patient attitudes to biosimilars. Methods Data were taken from the Adelphi Real World Biosimilars Programme, a real-world, cross-sectional study undertaken in 2015-2016 with German gastroenterologists and patients with ulcerative colitis or Crohn's disease. Gastroenterologists provided data on their prescribing behaviour and attitudes towards biosimilars, and invited the next eight eligible consecutive consulting patients to complete a detailed questionnaire. For analysis, gastroenterologists were split into 'Investigative', 'Conservative', and 'Other' groups. Results Overall, 25 gastroenterologists and 136 patients participated. Biosimilars accounted for < 15% of all biologic therapies and > 80% of gastroenterologists would prescribe a bio-originator rather than biosimilar as 1 st line therapy if unrestricted. Patients showed some reluctance to accept biosimilars, although of those receiving biosimilars, 79% were satisfied with the current treatment of their condition, and 69% were satisfied with the control of symptoms. Although at least 35% of patients in each analysis group reported no concerns when starting treatment with a bio-originator or biosimilar, 41% of previously biologic-naive patients prescribed a biosimilar indicated potential side effects and potential long-term problems, and 24% not knowing enough about the drug, as concerns. Conclusion Results demonstrate that there is reluctance from patients to accept biosimilars and the need to further educate patients who are unsure to allow them to be involved in decision making, highlighting the importance of patient and physician communication. There remains a need for further research into non-clinical switching and the long term impact of prescribing biosimilars.