# Implantation or Injectable Dosage Form New Animal Drugs; Trenbolone and Estradiol
> **Food and Drug Administration** · Final rule. · Published 2002-12-24 · Effective 2002-12-24 · 67 FR 78357
## Document
- **Document number:** 02-32342
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 67 FR 78357
- **CFR reference:** 21 CFR 522
- **Publication date:** 2002-12-24
- **Effective date:** 2002-12-24
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of an abbreviated new animal drug application (ANADA) filed by Ivy Laboratories, Division of Ivy Animal Health, Inc. The ANADA provides for subcutaneous use of an implant containing trenbolone acetate and estradiol for increased rate of weight gain and improved feed efficiency in feedlot heifers.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/12/24/02-32342/implantation-or-injectable-dosage-form-new-animal-drugs-trenbolone-and-estradiol)
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