To investigate healthcare professionals' knowledge and attitudes towards infliximab and insulin glargine biosimilars and the factors influencing their prescribing. Then, to compare healthcare professionals' attitudes with the utilisation of these biosimilars in UK hospitals.
Self-administered, one-time web-based survey and drug utilisation analysis.
Professional associations and societies in the field of dermatology, diabetology, gastroenterology and rheumatology in the UK, between 8 August 2016 and 8 January 2017. The volume of utilisation of branded and biosimilar infliximab and insulin glargine in UK hospitals was derived from the DEFINE database, between 2015 and 2016.
Participants' knowledge and awareness of biosimilars and factors influencing their use and corresponding usage of infliximab and insulin glargine biosimilars.
Responses were obtained from 234 healthcare professionals across dermatology, diabetology, gastroenterology and rheumatology specialties. 75% of respondents were aware that biosimilars were available on their local formulary. 77% of respondents considered biosimilars extremely or very important to save costs for the NHS. Gastroenterologists had the highest utilisation of infliximab biosimilars (14%) in 2015 rising to (62%) in 2016. Healthcare professionals had greater concerns about safety and efficacy when switching patients to biosimilars than when starting biosimilars in biological naïve patients. Guidance from National Institute for Health and Care Excellence and robust pharmacovigilance studies on biosimilars were both considered important factors in increasing biosimilars use.
British healthcare professionals are well informed about biosimilars with high level of awareness. Safety and efficacy concerns were higher in switching than in initiating biosimilars among some prescribers. It is probable that personal experience of biologics as well as discipline-specific guidance influenced prescribers' responses.