# New Animal Drugs for Use in Animal Feeds; Monensin, Sulfadimethoxine, and Ormetoprim; Technical Amendment
> **Food and Drug Administration** · Final rule; technical amendment. · Published 2001-05-02 · Effective 2001-05-02 · 66 FR 21861
## Document
- **Document number:** 01-10874
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 66 FR 21861
- **CFR reference:** 21 CFR 558
- **Publication date:** 2001-05-02
- **Effective date:** 2001-05-02
## Abstract

The Food and Drug Administration (FDA) is updating the animal drug regulations for medicated feeds to correctly reflect previously approved assay limits for Type A medicated articles containing monensin, or sulfadimethoxine and ormetoprim in combination. This action is being taken to improve the accuracy of the agency's regulations.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/05/02/01-10874/new-animal-drugs-for-use-in-animal-feeds-monensin-sulfadimethoxine-and-ormetoprim-technical)
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