# New Animal Drugs for Use in Animal Feeds; Melengestrol; Monensin
> **Food and Drug Administration** · Final rule. · Published 2009-11-19 · Effective 2009-11-19 · 74 FR 59911
## Document
- **Document number:** E9-27744
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 74 FR 59911
- **CFR reference:** 21 CFR 558
- **Publication date:** 2009-11-19
- **Effective date:** 2009-11-19
- **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 increased dose levels approved for single-ingredient Type C medicated feeds for heifers fed in confinement for slaughter containing melengestrol acetate or monensin in two-way, combination drug Type C medicated feeds containing melengestrol acetate and monensin.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/11/19/E9-27744/new-animal-drugs-for-use-in-animal-feeds-melengestrol-monensin)
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