# New Animal Drugs for Use in Animal Feeds; Ractopamine
> **Food and Drug Administration** · Final rule. · Published 2008-12-11 · Effective 2008-12-11 · 73 FR 75323
## Document
- **Document number:** E8-29177
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 73 FR 75323
- **CFR reference:** 21 CFR 558
- **Publication date:** 2008-12-11
- **Effective date:** 2008-12-11
- **HHS docket:** Docket No. FDA-2008-N-0039
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (ANADA) filed by Ivy Laboratories, Division of Ivy Animal Health, Inc. The supplemental ANADA provides for an increased level of monensin in four-way combination Type C medicated feeds containing ractopamine, melengestrol, monensin, and tylosin for heifers fed in confinement for slaughter; and a revision to bacterial pathogen nomenclature.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/12/11/E8-29177/new-animal-drugs-for-use-in-animal-feeds-ractopamine)
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