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Implantation or Injectable Dosage Form New Animal Drugs; Trenbolone and Estradiol

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Food and Drug Administration, HHS.


Final rule.


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, Division of Ivy Animal Health, Inc. The supplemental ANADA provides for the addition of tylosin tartrate to an approved subcutaneous implant containing trenbolone and estradiol used for increased rate of weight gain and improved feed efficiency in feedlot heifers.


This rule is effective July 17, 2003.

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Eric S. Dubbin, Center for Veterinary Medicine (HFV-126), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855; 301-827-0232;

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Ivy Laboratories, Division of Ivy Animal Health, Inc., 8857 Bond St., Overland Park, KS 66214, filed a supplement to ANADA 200-346 for COMPONENT TE-H (trenbolone acetate and estradiol), a subcutaneous implant used for increased rate of weight gain and improved feed efficiency in heifers fed in confinement for slaughter. The supplemental ANADA provides for the addition of a pellet containing 29 milligrams tylosin tartrate to the approved implant. The supplemental application is approved as of April 18, 2003, and the regulations are amended in 21 CFR 522.2477 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 21 CFR 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.

Under section 512(c)(2)(F)(iii) of the Federal Food, Drug, and Cosmetic Act (the act) (21 U.S.C. 360b(c)(2)(F)(iii)), this approval qualifies for 3 years of marketing exclusivity beginning April 18, 2003.

The agency has determined under 21 CFR 25.33(a)(1) 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.

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List of Subjects in 21 CFR Part 522

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Therefore, under the Federal Food, Drug, and Cosmetic Act and under the authority delegated to the Commissioner of Food and Drugs and redelegated to the Center for Veterinary Medicine,

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1. The authority citation for

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

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2. Section 522.2477 is amended in paragraph (b)(1) by adding “(d)(2)(i)(B),” after “(d)(2)(i)(A),”; in paragraph (b)(2) by removing “(d)(2)” and by adding in its place “(d)(2)(i)(A), (d)(2)(i)(C), (d)(2)(i)(D), (d)(2)(ii), (d)(2)(iii)”; in paragraph (d)(2)(i)(A) by removing “paragraphs (d)(2)(ii)(A) and (d)(2)(ii)(B)” and by adding in its place “paragraph (d)(2)(ii)(A)”; by redesignating paragraphs (d)(2)(i)(B) and (d)(2)(i)(C) as paragraphs (d)(2)(i)(C) and (d)(2)(i)(D); and by adding new paragraph (d)(2)(i)(B) to read as follows:

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Trenbolone acetate and estradiol.
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(d) * * *

(2) * * *

(i) * * *

(B) 140 mg trenbolone acetate and 14 mg estradiol (one implant consisting of 8 pellets, each of 7 pellets containing 20 mg trenbolone acetate and 2 mg estradiol, and 1 pellet containing 29 mg tylosin tartrate) per implant dose for use as in paragraphs (d)(2)(ii)(A) of this section.

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Dated: July 8, 2003.

Stephen F. Sundlof,

Director, Center for Veterinary Medicine.

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[FR Doc. 03-18088 Filed 7-16-03; 8:45 am]