Skip to Content


New Animal Drugs for Use in Animal Feeds; Amprolium and Bacitracin Methylene Disalicylate

Document Details

Information about this document as published in the Federal Register.

Published Document

This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Start Preamble Start Printed Page 20083


Food and Drug Administration, HHS.


Final rule.


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 use of approved, single-ingredient amprolium and bacitracin methylene disalicylate Type A medicated articles to make two-way combination drug Type C medicated feeds used for the development of active immunity to coccidiosis, increased rate of weight gain, and improved feed efficiency in replacement chickens.


This rule is effective April 19, 2001.

Start Further Info


Charles J. Andres, Center for Veterinary Medicine (HFV-128), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855, 301-827-1600.

End Further Info End Preamble Start Supplemental Information


Alpharma, Inc., One Executive Dr., P.O. Box 1399, Fort Lee, NJ 07024, filed NADA 141-156 that provides for use of Amprol® (25 percent amprolium) and BMD® (10, 25, 30, 40, 50, 60, or 75 grams per pound bacitracin methylene disalicylate) Type A medicated articles to make combination Type C medicated feeds containing 36.3 to 113.5 grams per ton (g/ton) amprolium and 4 to 50 g/ton bacitracin methylene disalicylate for use in replacement chickens. The Type C medicated feeds are used for the development of active immunity to coccidiosis, increased rate of weight gain, and improved feed efficiency in replacement chickens. The NADA is approved as of February 12, 2001, and 21 CFR 558.55 is amended to reflect the approval. The basis of approval is discussed in the freedom of information summary.

In accordance with the freedom of information provisions of 21 CFR part 20 and 514.11(e)(2)(ii), a summary of safety and effectiveness data and information submitted to support approval of this application may be seen in the Dockets Management Branch (HFA-305), Food and Drug Administration, 5630 Fishers Lane, rm. 1061, Rockville, MD 20852, between 9 a.m. and 4 p.m., Monday through Friday.

The agency has determined under 21 CFR 25.33(a)(2) that this action is of a type that does not individually or cumulatively have a significant effect on the human environment. Therefore, neither an environmental assessment nor an environmental impact statement is required.

This rule does not meet the definition of “rule” in 5 U.S.C. 804(3)(A) because it is a rule of “particular applicability.” Therefore, it is not subject to the congressional review requirements in 5 U.S.C. 801-808.

Start List of Subjects

List of Subjects in 21 CFR Part 558

  • Animal drugs
  • Animal feeds
End List of Subjects Start Amendment Part

Therefore, under the Federal Food, Drug, and Cosmetic Act and under authority delegated to the Commissioner of Food and Drugs and redelegated to the Center for Veterinary Medicine, 21 CFR part 558 is amended as follows:

End Amendment Part Start Part


End Part Start Amendment Part

1. The authority citation for 21 CFR part 558 continues to read as follows:

End Amendment Part Start Authority

Authority: 21 U.S.C. 360b, 371.

End Authority Start Amendment Part

2. Section 558.55 is amended in the table in paragraph (d)(2) by alphabetically adding an item under entry (i) to read as follows:

End Amendment Part
* * * * *

(d)  *  *  *

(2)  *  *  *

Amprolium in grams per tonCombination in grams per tonIndications for useLimitationsSponsor
(i) 36.3 to 113.5 (0.004% to 0.0125%).
*         *         *         *         *         *         *
Bacitracin methylene disalicylate 4 to 50. Replacement chickens; development of active immunity to coccidiosis, increased rate of weight gain, and improved feed efficiency. Feed according to subtable in item (i); bacitracin methylene disalicylate as provided by 046573 in § 510.600(c) of this chapter.046573
*         *         *         *         *         *         *
Start Printed Page 20084
* * * * *
Start Signature

Dated: April 9, 2001.

Stephen F. Sundlof,

Director, Center for Veterinary Medicine.

End Signature End Supplemental Information

[FR Doc. 01-9651 Filed 4-18-01; 8:45 am]