# New Animal Drugs for Use in Animal Feeds; Semduramicin, Virginiamycin, and Roxarsone
> **Food and Drug Administration** · Final rule. · Published 2004-03-22 · Effective 2004-03-22 · 69 FR 13221
## Document
- **Document number:** 04-6247
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 69 FR 13221
- **CFR reference:** 21 CFR 558
- **Publication date:** 2004-03-22
- **Effective date:** 2004-03-22
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a new animal drug application (NADA) filed by Phibro Animal Health. The NADA provides for the use of approved, single-ingredient Type A medicated articles containing semduramicin, virginiamycin, and roxarsone to formulate three-way combination drug Type C medicated feeds for broiler chickens.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/03/22/04-6247/new-animal-drugs-for-use-in-animal-feeds-semduramicin-virginiamycin-and-roxarsone)
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