# New Animal Drugs for Use in Animal Feeds; Chlortetracycline and Sulfamethazine
> **Food and Drug Administration** · Final rule. · Published 2003-04-28 · Effective 2003-04-28 · 68 FR 22294
## Document
- **Document number:** 03-10418
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 68 FR 22294
- **CFR reference:** 21 CFR 558
- **Publication date:** 2003-04-28
- **Effective date:** 2003-04-28
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of an abbreviated new animal drug application (ANADA) filed by Pennfield Oil Co. The ANADA provides for the use of a fixed-combination Type A medicated article containing chlortetracycline and sulfamethazine to make two-way combination drug Type C medicated feeds for beef cattle.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/04/28/03-10418/new-animal-drugs-for-use-in-animal-feeds-chlortetracycline-and-sulfamethazine)
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