# New Animal Drugs for Use in Animal Feeds; Monensin and Tylosin
> **Food and Drug Administration** · Final rule. · Published 2001-03-23 · Effective 2001-03-23 · 66 FR 16125
## Document
- **Document number:** 01-7182
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 66 FR 16125
- **CFR reference:** 21 CFR 558
- **Publication date:** 2001-03-23
- **Effective date:** 2001-03-23
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of two supplemental new animal drug applications (NADA's) filed by Elanco Animal Health. These supplemental NADA's provide for using tylosin or monensin and tylosin single-ingredient Type A medicated articles to make tylosin liquid Type B medicated feeds or combination drug liquid Type B medicated feeds. The liquid Type B medicated feeds are used to make dry Type C medicated feeds for cattle.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/03/23/01-7182/new-animal-drugs-for-use-in-animal-feeds-monensin-and-tylosin)
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