# New Animal Drugs For Use In Animal Feeds; Narasin and Nicarbazin With Roxarsone
> **Food and Drug Administration** · Final rule. · Published 1999-04-26 · Effective 1999-04-26 · 64 FR 20163
## Document
- **Document number:** 99-10291
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 64 FR 20163
- **CFR reference:** 21 CFR 558
- **Publication date:** 1999-04-26
- **Effective date:** 1999-04-26
## Abstract

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, a Division of Eli Lilly and Co. The NADA provides for combining approved narasin/nicarbazin (1:1 fixed ratio) and roxarsone type A medicated articles to make combination drug type C medicated broiler chicken feeds for prevention of coccidiosis, for increased rate of weight gain, improved feed efficiency, and improved pigmentation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/04/26/99-10291/new-animal-drugs-for-use-in-animal-feeds-narasin-and-nicarbazin-with-roxarsone)
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