# Ractopamine.
**AGENCY:**
Food and Drug Administration, HHS.
**ACTION:**
Final rule.
**SUMMARY:**
The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Elanco Animal Health. The supplemental NADA provides for an increased level of monensin in three-way combination Type C medicated feeds containing ractopamine, monensin, and tylosin for cattle fed in confinement for slaughter and a revision to bacterial pathogen nomenclature.
**DATES:**
This rule is effective November 6, 2007.
**FOR FURTHER INFORMATION CONTACT:**
Daniel A. Benz, Center for Veterinary Medicine (HFV-126), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855, 301-827-0223, e-mail: *[email protected]* .
**SUPPLEMENTARY INFORMATION:**
Elanco Animal Health, A Division of Eli Lilly & Co., Lilly Corporate Center, Indianapolis, IN 46285, filed a supplement to NADA 141-224 that provides for use of OPTAFLEXX (ractopamine hydrochloride), RUMENSIN (monensin USP), and TYLAN (tylosin phosphate) Type A medicated articles to make dry and liquid three-way combination medicated feeds for cattle fed in confinement for slaughter. The supplemental NADA provides for an increased level of monensin in combination Type C medicated feeds and a revision to bacterial pathogen nomenclature. The supplemental NADA is approved as of October 12, 2007, and the regulations in 21 CFR 558.500 are amended to reflect the approval.
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 Division of Dockets Management (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.
**List of Subjects in 21 CFR Part 558**
Animal drugs, Animal feeds.
**21 CFR Part 558**
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, 21 CFR part 558 is amended as follows:
**PART 558—NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS**
**21 CFR Part 558**
1. The authority citation for 21 CFR part 558 continues to read as follows:
**Authority:**
21 U.S.C. 360b, 371.
**21 CFR Part 558**
2. In § 558.500, in the table in paragraph (e)(2), revise paragraphs (e)(2)(iv) and (e)(2)(ix) to read as follows:
§ 558.500
(e) * * *
(2) * * *
| Ractopamine in grams/ton | Combination in grams/ton | Indications for use | Limitations | Sponsor |
| --- | --- | --- | --- | --- |
| * * * * * * * | | | | |
| (iv) 8.2 to 24.6 | Monensin 10 to 40 to provide 0.14 to 0.42 mg monensin/lb of body weight, depending on severity of coccidiosis challenge, up to 480 mg/head/day, plus tylosin 8 to 10 | Cattle fed in confinement for slaughter: As in paragraph (e)(2)(i) of this section; for prevention and control of coccidiosis due to
and
; and for reduction of incidence of liver abscesses caused by
and
. | As in paragraph (e)(2)(i) of this section; see §§ 558.355(d) and 558.625(c) of this chapter. | 000986 |
| * * * * * * * | | | | |
| (ix) 9.8 to 24.6 | Monensin 10 to 40 to provide 0.14 to 0.42 mg monensin/lb of body weight, depending on severity of coccidiosis challenge, up to 480 mg/head/day, plus tylosin 8 to 10 | Cattle fed in confinement for slaughter: As in paragraph (e)(2)(vi) of this section; for prevention and control of coccidiosis due to
and
; and for reduction of incidence of liver abscesses caused by
and
. | As in paragraph (e)(2)(vi) of this section; see §§ 558.355(d) and 558.625(c) of this chapter. | 000986 |
| * * * * * * * | | | | |
Dated: October 26, 2007.
Bernadette Dunham,
Deputy Director, Center for Veterinary Medicine.