# Implantation or Injectable Dosage Form New Animal Drugs; Trenbolone and Estradiol
> **Food and Drug Administration** · Final rule. · Published 2000-11-27 · Effective 2000-11-27 · 65 FR 70662
## Document
- **Document number:** 00-30049
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 65 FR 70662
- **CFR reference:** 21 CFR 522
- **Publication date:** 2000-11-27
- **Effective date:** 2000-11-27
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental abbreviated new animal drug application (ANADA) filed by Ivy Laboratories, Inc. The supplemental ANADA provides for adding tylosin tartrate as a local antibacterial to an approved subcutaneous cattle ear implant containing trenbolone and estradiol used in pasture cattle for increased rate of weight gain.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/11/27/00-30049/implantation-or-injectable-dosage-form-new-animal-drugs-trenbolone-and-estradiol)
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