Biosimilarity Assessment

Authored by: Shein-Chung Chow , Fuyu Song

Encyclopedia of Biopharmaceutical Statistics

Print publication date:  August  2018
Online publication date:  August  2018

Print ISBN: 9781498733953
eBook ISBN: 9781351110273
Adobe ISBN:


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In recent years, the assessment of biosimilarity between a proposed biosimilar product and an innovative biological product has attracted much attention since the passage of the Biologics Price Competition and Innovation Act in 2009. In this article, we provide an overview of regulatory requirements for review and approval of biosimilar products. Unlike the generic products, the development of biosimilar products is much more complicated because of fundamental differences in functional structures and manufacturing processes. As a result, the criteria and standard methods for the design and analysis of bioequivalence assessment of generic drug products may not be directly applicable to assessing biosimilarity of biosimilar products. In this article, we provide some scientific/statistical considerations for criteria, design, and analysis regarding the assessment of biosimilarity and drug interchangeability of biosimilar products. In addition, we discuss scientific and practical issues raised at the 2010 Food and Drug Administration (FDA) public hearing and the 2011 FDA public meeting on biosimilar products.

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