US interchangeability designation: are we ready to cut the Gordian knot?

Author byline as per print journal: Joseph P Park1, PhD; Gillian R Woollett2, MA, DPhil Abstract: US Food and Drug Administration’s (FDA) current thinking on interchangeability has evolved since the legal designation was first created in 2010. Based on experience, FDA now acknowledges that clinical switching studies are not generally needed for the interchangeability designation […]


Misinformation about interchangeable biosimilars undermines US health policy, physician confidence, and patient health

Author byline as per print journal: Michael S Reilly, Esq; Ralph D McKibbin, MD, FACP, FACG, AGAF Abstract: The US biosimilar programme has been highly successful with 53 biosimilars approved by the US Food and Drug Administration (FDA) for 17 reference products. As in most advanced nations of Europe, all FDA-approved biosimilars may be substituted […]


Biosimilars drug development: time for a paradigm shift?

Author byline as per print journal: Sandeep N Athalye, MBBS, MD; Shivani Mittra, MPharm, PhD; Ankitkumar M Ranpura, MD Abstract: The sky-rocketing cost of developing biosimilars is becoming a shared deterrent for biosimilar developers. The regulatory requirements for biosimilars must see a natural evolution and a paradigm shift towards removing inefficiencies in clinical designs to […]


US prescribers’ attitudes and perceptions about biosimilars

Author byline as per print journal: Michael S Reilly, Esq; Ralph D McKibbin, MD, FACP, FACG, AGAF Introduction: In the United States (US), a legal framework for approving biosimilars was established via the Biologics Price Competition and Innovation Act of 2009 (BPCI Act). At the time of writing (September 2022), 38 biosimilars have been approved […]


On statistical evaluation for interchangeability of biosimilar products

Author byline as per print journal: Yuqi Li, BS Pharm; Shein-Chung Chow, PhD Abstract:  A biosimilar product is a biological product which is highly similar to an existing reference product in structure and function and has no clinically meaningful difference in terms of safety, purity or potency. Under the Biologics Price Competition and Innovation Act of […]


Substitution and interchangeability: time for a conversation?

Author byline as per print journal: Chad Rieger1, MBA; Lisa Hall1, PhD; David Lim2,3, DPH Abstract: Bandiera et al. (2002) identified the potential for competitors’ promotional materials to use certain terms with technical meanings, such as ‘interchangeable’ and ‘substitution’, in a misleading way in Australia. Submitted: 30 June 2022; Revised: 4 July 2022; Accepted: 5 […]


Biosimilarity is not a transitive property: implication for interchangeability, naming and pharmacovigilance

Abstract: Current regulations do not require a given biosimilar to remain similar to its reference biological over time. However, two products that were initially deemed biosimilar or interchangeable could each undergo unique patterns of drift and evolution in their manufacturing processes (divergence), ultimately resulting in two products that would be no longer biosimilar. In cases […]


No need for systematic switch studies to demonstrate interchangeability of biosimilars

Abstract: Systematic clinical switch studies to demonstrate interchangeability of biosimilars are required in some jurisdictions while theoretical considerations and current clinical data question the feasibility and relevance of such studies. Submitted: 27 November 2021; Revised: 15 December 2021; Accepted: 15 December 2021; Published online first: 28 December 2021 Biosimilars have been used for 15 years […]


Reasons for patients’ generic drug switching at the pharmacy counter: a pilot study

Author byline as per print journal: Pieter J Glerum1,2, MSc; Mert Hayta1,3, PharmD, MSc; David M Burger4, PharmD, PhD; Cees Neef5, PharmD, PhD; Marcel L Bouvy3, PharmD, PhD; Marc Maliepaard1,6, PhD Background: Drug switching describes switching between drug products with the same active substance. Drug switching occurs commonly in the Netherlands and mostly between generic drug […]


EU Member States have tools to reduce costs of bestseller biologicals but can they use them?

Abstract: Major cost savings are achievable in pharmacotherapy in the European Union since biosimilars to most best-selling biological medicinal products have been licensed. Unfortunately, the window of opportunity may be missed since neither national pricing, reimbursement and procurement systems nor prescribers are well prepared for biosimilars’ entry to the market. Submitted: 9 March 2018; Revised: […]


USA and Europe differ in interchangeability of biosimilars

Abstract: This paper highlights differences between USA and Europe when it comes to the interchangeability of biosimilars. The lack of harmonization between USA and Europe may introduce confusion for stakeholders and biosimilars makers and could be delaying access to life-saving treatments. Submitted: 5 December 2017; Revised: 7 December 2017; Accepted: 8 December 2017; Published online […]


Building stakeholder confidence in biosimilar medicines through evidence-based information sharing

Abstract: The European Commission held a stakeholder event to discuss biosimilar medicinal products in May 2017. A session on building stakeholder confidence in biosimilar medicines provided an update of the latest available clinical experiences with biosimilar medicines, focusing on switching between biological medicines and interchangeability. Assistant Professor Gianluca Trifirò from the University of Messina, Italy, […]