# New Animal Drugs for Use in Animal Feeds; Bacitracin Methylene Disalicylate and Chlortetracycline
> **US Department of Health and Human Services** · Final rule. · Published 1997-03-19 · Effective 1997-03-19 · 62 FR 12951
## Document
- **Document number:** 97-6876
- **Category:** other
- **Sub-agency:** US Department of Health and Human Services
- **Federal Register citation:** 62 FR 12951
- **CFR reference:** 21 CFR 558
- **Publication date:** 1997-03-19
- **Effective date:** 1997-03-19
## 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 Alpharma Inc. The NADA provides for using currently approved, single ingredient, Type A medicated articles in making combination drug, Types B and C medicated, swine feeds containing bacitracin methylene disalicylate and chlortetracycline. The Type C medicated feed is used for increased rate of weight gain and improved feed efficiency due to the activity of bacitracin, and treatment of enteritis and pneumonia caused by certain bacteria susceptible to chlortetracycline.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/03/19/97-6876/new-animal-drugs-for-use-in-animal-feeds-bacitracin-methylene-disalicylate-and-chlortetracycline)
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