# New Animal Drugs for Use in Animal Feeds; Sulfadimethoxine, Ormetoprim
> **Food and Drug Administration** · Final rule. · Published 1999-08-12 · Effective 1999-08-12 · 64 FR 43909
## Document
- **Document number:** 99-20844
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 64 FR 43909
- **CFR reference:** 21 CFR 558
- **Publication date:** 1999-08-12
- **Effective date:** 1999-08-12
## Abstract

The Food and Drug Administration (FDA) is amending the new animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Roche Vitamins, Inc. The supplemental NADA provides for a change in the name of a duck pathogen. Infections of the pathogen are controlled by use of sulfadimethoxine/ormetoprim Type C medicated feed.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/08/12/99-20844/new-animal-drugs-for-use-in-animal-feeds-sulfadimethoxine-ormetoprim)
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