Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies

This detailed review looks at how the rules for proving biosimilarity are changing, mainly focusing on the requirements for comparative efficacy studies (CESs). As analytical technologies progress, mounting evidence suggests that when we establish robust analytical similarity and pharmacokinetic equ...

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Main Author: Sarfaraz K. Niazi
Format: Article
Language:English
Published: MDPI AG 2025-05-01
Series:Pharmaceuticals
Subjects:
Online Access:https://www.mdpi.com/1424-8247/18/6/779
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author Sarfaraz K. Niazi
author_facet Sarfaraz K. Niazi
author_sort Sarfaraz K. Niazi
collection DOAJ
description This detailed review looks at how the rules for proving biosimilarity are changing, mainly focusing on the requirements for comparative efficacy studies (CESs). As analytical technologies progress, mounting evidence suggests that when we establish robust analytical similarity and pharmacokinetic equivalence, CESs become less valuable. This review combines findings from over 600 studies on biosimilars found in PubMed (showing that no biosimilar with proven analytical similarity has ever failed a CES), looks at the differences in global regulations on this topic, and explains how the Food and Drug Administration’s pharmacokinetic testing rules for biosimilars are similar to the bioequivalence testing for generics. Finally, specific changes to the Biologics Price Competition and Innovation Act (BPCIA) are suggested to make US rules match the growing global scientific agreement, which could lower development costs and speed up patient access to biosimilars while still keeping safety and effectiveness intact.
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spelling doaj-art-9f62a5547db04da5ba12b3cde8cd729c2025-08-20T03:27:39ZengMDPI AGPharmaceuticals1424-82472025-05-0118677910.3390/ph18060779Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy StudiesSarfaraz K. Niazi0College of Pharmacy, University of Illinois, Chicago, IL 60612, USAThis detailed review looks at how the rules for proving biosimilarity are changing, mainly focusing on the requirements for comparative efficacy studies (CESs). As analytical technologies progress, mounting evidence suggests that when we establish robust analytical similarity and pharmacokinetic equivalence, CESs become less valuable. This review combines findings from over 600 studies on biosimilars found in PubMed (showing that no biosimilar with proven analytical similarity has ever failed a CES), looks at the differences in global regulations on this topic, and explains how the Food and Drug Administration’s pharmacokinetic testing rules for biosimilars are similar to the bioequivalence testing for generics. Finally, specific changes to the Biologics Price Competition and Innovation Act (BPCIA) are suggested to make US rules match the growing global scientific agreement, which could lower development costs and speed up patient access to biosimilars while still keeping safety and effectiveness intact.https://www.mdpi.com/1424-8247/18/6/779biosimilarsBPCIAFDAEMAMHRAclinical efficacy study
spellingShingle Sarfaraz K. Niazi
Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies
Pharmaceuticals
biosimilars
BPCIA
FDA
EMA
MHRA
clinical efficacy study
title Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies
title_full Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies
title_fullStr Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies
title_full_unstemmed Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies
title_short Scientific Justification and Policy Recommendations to the US Food and Drug Administration for Waiving Comparative Efficacy Studies
title_sort scientific justification and policy recommendations to the us food and drug administration for waiving comparative efficacy studies
topic biosimilars
BPCIA
FDA
EMA
MHRA
clinical efficacy study
url https://www.mdpi.com/1424-8247/18/6/779
work_keys_str_mv AT sarfarazkniazi scientificjustificationandpolicyrecommendationstotheusfoodanddrugadministrationforwaivingcomparativeefficacystudies