# Implantation or Injectable Dosage Form New Animal Drugs; Trenbolone Acetate and Estradiol
> **Food and Drug Administration** · Final rule; technical amendment. · Published 2007-02-15 · Effective 2007-02-15 · 72 FR 7348
## Document
- **Document number:** E7-2580
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 72 FR 7348
- **CFR reference:** 21 CFR 522
- **Publication date:** 2007-02-15
- **Effective date:** 2007-02-15
## 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 an additional dose of trenbolone acetate and estradiol implant used for increased rate of weight gain and improved feed efficiency in feedlot steers.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/02/15/E7-2580/implantation-or-injectable-dosage-form-new-animal-drugs-trenbolone-acetate-and-estradiol)
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