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FEDERAL REGISTER · NOTICENovember 20, 2025NOTICE — NO LEGAL EFFECT

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Biosimilarity to a Reference Product: Updated Recommendations for Assessing the Need for Comparative Efficacy Studies; Draft Guidance for Industry; Availability

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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.

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The Food and Drug Administration (FDA, Agency, or we) is announcing the availability of a draft guidance for industry entitled "Scientific Considerations in Demonstrating Biosimilarity to a Reference Product: Updated Recommendations for Assessing the Need for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 This draft guidance describes considerations regarding a comparative clinical study or studies with efficacy endpoints (a comparative efficacy study or CES) intended to support a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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