# New Animal Drugs For Use In Animal Feeds; Semduramicin and Virginiamycin
> **Food and Drug Administration** · Final rule. · Published 1999-09-03 · Effective 1999-09-03 · 64 FR 48295
## Document
- **Document number:** 99-22997
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 64 FR 48295
- **CFR reference:** 21 CFR 556
- **Publication date:** 1999-09-03
- **Effective date:** 1999-09-03
## 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 Pfizer, Inc. The NADA provides for using approved single ingredient semduramicin and virginiamycin Type A medicated articles to make combination drug Type C medicated broiler chicken feeds. Approval of the NADA also provides for tolerances for semduramicin residues and an acceptable daily intake (ADI) for semduramicin and for virginiamycin.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/09/03/99-22997/new-animal-drugs-for-use-in-animal-feeds-semduramicin-and-virginiamycin)
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