# New Animal Drugs for Use in Animal Feeds; Chlortetracycline
> **Food and Drug Administration** · Final rule. · Published 1997-11-19 · Effective 1997-11-19 · 62 FR 61627
## Document
- **Document number:** 97-30405
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 62 FR 61627
- **CFR reference:** 21 CFR 558
- **Publication date:** 1997-11-19
- **Effective date:** 1997-11-19
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Hoffmann-La Roche, Inc. The supplemental NADA provides for changing the withdrawal time to zero following certain uses of chlortetracycline (CTC) in Type C cattle feeds (including free-choice feeds).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/11/19/97-30405/new-animal-drugs-for-use-in-animal-feeds-chlortetracycline)
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