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FEDERAL REGISTER · NOTICENovember 20, 2025

Scientific Considerations in Demonstrating Biosimilarity to a Reference Product: Updated Recommendations for Assessing the Need for Comparative Efficacy Studies; Draft Guidance for Industry; Availability

Document type
Notice
Agency
Health and Human Services Department
Published
November 20, 2025
Comments close
January 20, 2026
Document number
2025-20380
ABSTRACT

The Food and Drug Administration (FDA, Agency, or we) is announcing the availability of a draft guidance for industry entitled "Scientific Considerations in Demonstrating Biosimilarity to a Reference Product: Updated Recommendations for Assessing the Need for Comparative Efficacy Studies." This draft guidance describes considerations regarding a comparative clinical study or studies with efficacy endpoints (a comparative efficacy study or CES) intended to support a demonstration that a proposed therapeutic protein product is biosimilar to a reference product for the purpose of submitting a marketing application under the Public Health Service Act (PHS Act).

Abstract as published in the Federal Register.

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Document details are published in the U.S. Federal Register; SPEQ surfaces them for reference and is not affiliated with or endorsed by the FDA or the Office of the Federal Register. The authoritative text is on federalregister.gov.