# New Animal Drugs For Use In Animal Feeds; Melengestrol Acetate and Oxytetracycline
> **Food and Drug Administration** · Final rule. · Published 1998-08-03 · Effective 1998-08-03 · 63 FR 41191
## Document
- **Document number:** 98-20535
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 63 FR 41191
- **CFR reference:** 21 CFR 558
- **Publication date:** 1998-08-03
- **Effective date:** 1998-08-03
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of two original new animal drug applications (NADA's) filed by Pharmacia & Upjohn Co. The NADA's provide for the use of separately approved Type A medicated articles containing melengestrol acetate (dry and liquid form) and oxytetracycline (dry form) to make dry combination drug Type C medicated feeds. The Type C medicated feeds are for heifers fed in confinement for slaughter for increased rate of weight gain, improved feed efficiency, suppression of estrus, and reduced incidence of liver abscesses.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/08/03/98-20535/new-animal-drugs-for-use-in-animal-feeds-melengestrol-acetate-and-oxytetracycline)
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