# New Animal Drugs for Use in Animal Feeds; Melengestrol; Monensin; Tylosin
> **Food and Drug Administration** · Final rule. · Published 2009-11-23 · Effective 2009-11-23 · 74 FR 61029
## Document
- **Document number:** E9-28019
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 74 FR 61029
- **CFR reference:** 21 CFR 558
- **Publication date:** 2009-11-23
- **Effective date:** 2009-11-23
- **HHS docket:** Docket No. FDA-2009-N-0665
## 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 Pharmacia & Upjohn Co., a Division of Pfizer, Inc. The supplemental NADA provides for use of the same dose levels approved for single-ingredient Type C medicated feeds containing melengestrol acetate, monensin, or tylosin phosphate for heifers fed in confinement for slaughter in three-way, combination drug Type C medicated feeds containing melengestrol acetate, monensin, and tylosin phosphate.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/11/23/E9-28019/new-animal-drugs-for-use-in-animal-feeds-melengestrol-monensin-tylosin)
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