# New Animal Drugs for Use in Animal Feeds; Monensin and Tylosin
> **Food and Drug Administration** · Final rule. · Published 1999-01-19 · Effective 1999-01-19 · 64 FR 2855
## Document
- **Document number:** 99-1037
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 64 FR 2855
- **CFR reference:** 21 CFR 558
- **Publication date:** 1999-01-19
- **Effective date:** 1999-01-19
## 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 Elanco Animal Health, A Division of Eli Lilly and Co. The supplemental NADA provides for use of monensin and tylosin Type A medicated articles for making Type B and C cattle feeds, the Type C cattle feed to be fed at a range of 60 to 90 milligrams of tylosin per head per day (mg/hd/day) rather than the currently approved 90 mg/hd/day.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/01/19/99-1037/new-animal-drugs-for-use-in-animal-feeds-monensin-and-tylosin)
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