# Implantation or Injectable Dosage Form New Animal Drugs; Trenbolone Acetate and Estradiol Benzoate
> **Food and Drug Administration** · Final rule. · Published 1998-11-17 · Effective 1998-11-17 · 63 FR 63788
## Document
- **Document number:** 98-30611
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 63 FR 63788
- **CFR reference:** 21 CFR 522
- **Publication date:** 1998-11-17
- **Effective date:** 1998-11-17
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Fort Dodge Animal Health, Division of American Home Products Corp. The supplemental NADA provides for the use of a trenbolone acetate and estradiol benzoate ear implant in heifers fed in confinement for slaughter for increased rate of weight gain.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/11/17/98-30611/implantation-or-injectable-dosage-form-new-animal-drugs-trenbolone-acetate-and-estradiol-benzoate)
---
*AI Analytics · CC0 1.0*