# New Animal Drugs for Use in Animal Feeds; Ractopamine and Tylosin
> **Food and Drug Administration** · <RM>Final rule. · Published 2001-04-30 · Effective 2001-04-30 · 66 FR 21283
## Document
- **Document number:** 01-10622
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 66 FR 21283
- **CFR reference:** 21 CFR 558
- **Publication date:** 2001-04-30
- **Effective date:** 2001-04-30
## Abstract

<RM>The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a new animal drug application (NADA) filed by Elanco Animal Health. The NADA provides for use of ractopamine and tylosin single-ingredient Type A medicated articles to make combination drug Type C medicated feeds used for increased rate of weight gain, improved feed efficiency, increased carcass leanness, and prevention and/or control of porcine proliferative enteropathies (ileitis) in swine.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/04/30/01-10622/new-animal-drugs-for-use-in-animal-feeds-ractopamine-and-tylosin)
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