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U.S. Department of Health and Human Services

CFR - Code of Federal Regulations Title 21

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The information on this page is current as of Dec 22, 2023.

For the most up-to-date version of CFR Title 21, go to the Electronic Code of Federal Regulations (eCFR).

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TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION
DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER D - DRUGS FOR HUMAN USE
 
PART 320BIOAVAILABILITY AND BIOEQUIVALENCE REQUIREMENTS
 

Subpart A - General Provisions
   § 320.1 - Definitions.

Subpart B - Procedures for Determining the Bioavailability or Bioequivalence of Drug Products
   § 320.21 - Requirements for submission of bioavailability and bioequivalence data.
   § 320.22 - Criteria for waiver of evidence of in vivo bioavailability or bioequivalence.
   § 320.23 - Basis for measuring in vivo bioavailability or demonstrating bioequivalence.
   § 320.24 - Types of evidence to measure bioavailability or establish bioequivalence.
   § 320.25 - Guidelines for the conduct of an in vivo bioavailability study.
   § 320.26 - Guidelines on the design of a single-dose in vivo bioavailability or bioequivalence study.
   § 320.27 - Guidelines on the design of a multiple-dose in vivo bioavailability study.
   § 320.28 - Correlation of bioavailability with an acute pharmacological effect or clinical evidence.
   § 320.29 - Analytical methods for an in vivo bioavailability or bioequivalence study.
   § 320.30 - Inquiries regarding bioavailability and bioequivalence requirements and review of protocols by the Food and Drug Administration.
   § 320.31 - Applicability of requirements regarding an "Investigational New Drug Application."
   § 320.32 - Procedures for establishing or amending a bioequivalence requirement.
   § 320.33 - Criteria and evidence to assess actual or potential bioequivalence problems.
   § 320.34 - Requirements for batch testing and certification by the Food and Drug Administration.
   § 320.35 - Requirements for in vitro testing of each batch.
   § 320.36 - Requirements for maintenance of records of bioequivalence testing.
   § 320.38 - Retention of bioavailability samples.
   § 320.63 - Retention of bioequivalence samples.

Authority: 21 U.S.C. 321, 351, 352, 355, 371.

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