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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
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Title 21
Chapter I
Part 500
Subpart C - Subpart C—Animal Drug Labeling Requirements
§ 500.51 - Labeling of animal drugs; misbranding.
§ 500.52 - Use of terms such as “tonic”, “tone”, “toner”, or “conditioner” in the labeling of preparations intended for use in or on animals.
§ 500.55 - Exemption from certain drug-labeling requirements.
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