# New Animal Drugs For Use in Animal Feed; Zilpaterol
> **Food and Drug Administration** · Final rule. · Published 2008-03-31 · Effective 2008-03-31 · 73 FR 16754
## Document
- **Document number:** E8-6601
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 73 FR 16754
- **CFR reference:** 21 CFR 558
- **Publication date:** 2008-03-31
- **Effective date:** 2008-03-31
## 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 Intervet Inc. The NADA provides for use of approved, single-ingredient Type A medicated articles containing zilpaterol hydrochloride and melengestrol acetate in two-way combination Type B and Type C medicated feeds for heifers fed in confinement for slaughter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/03/31/E8-6601/new-animal-drugs-for-use-in-animal-feed-zilpaterol)
---
*AI Analytics · CC0 1.0*