# New Animal Drugs For Use in Animal Feeds; Ractopamine
> **Food and Drug Administration** · Final rule. · Published 2006-11-21 · Effective 2006-11-21 · 71 FR 67300
## Document
- **Document number:** E6-19615
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 71 FR 67300
- **CFR reference:** 21 CFR 558
- **Publication date:** 2006-11-21
- **Effective date:** 2006-11-21
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of two supplemental new animal drug applications (NADAs) filed by Elanco Animal Health. The first supplemental NADA revises the concentrations of ractopamine hydrochloride in single-ingredient Type B and C medicated swine feeds used for increased rate of weight gain, improved feed efficiency, and increased carcass leanness. The other supplemental NADA revises the concentrations of ractopamine hydrochloride used with tylosin phosphate in two-way Type C medicated swine feeds to conform with approved single-ingredient ractopamine use.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/11/21/E6-19615/new-animal-drugs-for-use-in-animal-feeds-ractopamine)
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