# New Animal Drugs for Use in Animal Feeds; Chlortetracycline and Sulfamethazine; Chlortetracycline; Procaine Penicillin; and Sulfamethazine
> **Food and Drug Administration** · Final rule. · Published 2014-07-02 · Effective 2014-07-02 · 79 FR 37622
## Document
- **Document number:** 2014-15274
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 79 FR 37622
- **CFR reference:** 21 CFR 558
- **Publication date:** 2014-07-02
- **Effective date:** 2014-07-02
- **HHS docket:** Docket No. FDA-2014-N-0002
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect the withdrawal of approval of those parts of a new animal drug application (NADA) for a three-way, fixed-ratio, combination drug Type A medicated article that pertain to use of the procaine penicillin component for growth promotion indications in swine and to reflect the reformulation of the Type A medicated article as a two-way, fixed-ratio, combination drug product without penicillin.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/07/02/2014-15274/new-animal-drugs-for-use-in-animal-feeds-chlortetracycline-and-sulfamethazine-chlortetracycline)
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