Skip to Content


Implantation or Injectable Dosage Form New Animal Drugs; Ivermectin and Clorsulon

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


Food and Drug Administration, HHS.


Final rule.


The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of an abbreviated new animal drug application (ANADA) filed by Norbrook Laboratories, Ltd. The ANADA provides for the use of an ivermectin and clorsulon solution by subcutaneous injection in cattle for control of various internal and external parasites.


This rule is effective May 17, 2007.

Start Further Info


John K. Harshman, Center for Veterinary Medicine (HFV-104), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855, 301-827-0169, e-mail:

End Further Info End Preamble Start Supplemental Information


Norbrook Laboratories, Ltd., Station Works, Newry BT35 6JP, Northern Ireland, filed ANADA 200-436 that provides for use of NOROMECTIN Plus (ivermectin and clorsulon) Injection for Cattle by subcutaneous injection in cattle for control of various internal and external parasites. Norbrook Laboratories, Ltd.'s NOROMECTIN Plus Injection for Cattle Start Printed Page 27734is approved as a generic copy of Merial, Ltd.'s IVOMEC Plus Injection for Cattle, approved under NADA 140-833. The ANADA is approved as of April 23, 2007, and the regulations are amended in 21 CFR 522.1193 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.

FDA 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.

Start List of Subjects

List of Subjects in 21 CFR Part 522

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,

End Amendment Part Start Part


End Part Start Amendment Part

1. The authority citation for

End Amendment Part Start Authority

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

End Authority Start Amendment Part

2. Amend § 522.1193 as follows:

End Amendment Part

a. Revise the section heading and paragraphs (a) and (b);

b. Redesignate paragraph (d) as paragraph (e);

c. Add new paragraph (d); and

d. Revise newly redesignated paragraph (e).

The revisions, redesignation, and addition read as follows:

Ivermectin and clorsulon.

(a) Specifications. Each milliliter (mL) of solution contains 10 milligrams (mg) (1 percent) ivermectin and 100 mg (10 percent) clorsulon.

(b) Sponsors. See Nos. 050604 and 055529 in § 510.600(c) of this chapter for use as in paragraph (e) of this section.

* * * * *

(d) Special considerations. See § 500.25 of this chapter.

(e) Conditions of use in cattle—(1) Amount. Administer 1 mL (10 mg ivermectin and 100 mg clorsulon) per 50 kilograms (110 pounds) by subcutaneous injection.

(2) Indications for use. For the treatment and control of gastrointestinal nematodes (adults and fourth-stage larvae) (Haemonchus placei, Ostertagia ostertagi (including inhibited larvae), O. lyrata, Trichostrongylus axei, T. colubriformis, Cooperia oncophora, C. punctata, C. pectinata, Oesophagostomum radiatum, Nematodirus helvetianus (adults only), N. spathiger (adults only), Bunostomum phlebotomum; lungworms (adults and fourth-stage larvae) (Dictyocaulus viviparus); liver flukes (adults only) (Fasciola hepatica); grubs (parasitic stages) (Hypoderma bovis, H. lineatum); lice (Linognathus vituli, Haematopinus eurysternus, Solenopotes capillatus); mites (Psoroptes ovis (syn. P. communis var. bovis), Sarcoptes scabiei var. bovis); and for control of infections of D. viviparus and O. radiatum for 28 days afer treatment; O. ostertagi, T. axei, and C. punctata for 21 days after treatment; and H. placei and C. oncophora for 14 days after treatment.

(3) Limitations. For subcutaneous use only. Not for intravenous or intramuscular use. Do not treat cattle within 49 days of slaughter. Because a withdrawal time in milk has not been established, do not use in female dairy cattle of breeding age. Do not use in other animal species because severe adverse reactions, including fatalities in dogs, may result. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal.

Start Signature

Dated: May 7, 2007.

Bernadette Dunham,

Deputy Director, Center for Veterinary Medicine.

End Signature End Supplemental Information

[FR Doc. E7-9517 Filed 5-16-07; 8:45 am]