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Oral Dosage Form New Animal Drugs; Praziquantel and Pyrantel

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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 new animal drug application (NADA) filed by Bayer HealthCare LLC. The supplement provides for two new sizes of praziquantel and pyrantel pamoate tablets used in cats and kittens for the removal of various internal parasites and for a revised kitten age and weight restriction.


This rule is effective September 3, 2010.

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Melanie R. Berson, Center for Veterinary Medicine (HFV-110), Food and Drug Administration, 7500 Standish Pl., Rockville, MD 20855, 240-276-8337, email:

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Bayer HealthCare LLC, Animal Health Division, P.O. Box 390, Shawnee Mission, KS 66201, filed a supplement to NADA 141-008 for DRONTAL (praziquantel and pyrantel pamoate) Tablets used in cats and kittens for the removal of various internal parasites. The supplement provides for two new tablet sizes and for a revised kitten age and weight restriction. The supplemental NADA is approved as of June 15, 2010, and 21 CFR 520.1871 is amended to reflect the approval.

FDA has determined under 21 CFR 25.33 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 520

  • Animal drugs
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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 520 is amended as follows:

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1. The authority citation for 21 CFR part 520 continues to read as follows:

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

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2. In § 520.1871, in paragraph (b)(1), remove “tablet” and in its place add “tablets”; and revise paragraphs (a)(1), (d)(1)(i), and (d)(1)(iii) to read as follows:

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Praziquantel and pyrantel.

(a) * * *

(1) Each tablet contains 13.6 milligrams (mg) praziquantel and 54.3 mg pyrantel base (as pyrantel pamoate), 18.2 mg praziquantel and 72.6 mg pyrantel base (as pyrantel pamoate), or 27.2 mg praziquantel and 108.6 mg pyrantel base (as pyrantel pamoate).

(d) * * *

(1) * * *

(i) Dosage. Administer a minimum dose of 2.27 mg praziquantel and 9.2 mg pyrantel pamoate per pound of body weight according to the dosing tables on labeling. May be given directly by mouth or in a small amount of food. Do not withhold food prior to or after treatment. If reinfection occurs, treatment may be repeated.

(iii) Limitations. Not for use in kittens less than 2 months of age or weighing less than 2.0 pounds. Consult your veterinarian before giving to sick or pregnant animals.

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Dated: August 31, 2010.

Elizabeth Rettie,

Deputy Director, Office of New Animal Drug Evaluation, Center for Veterinary Medicine.

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[FR Doc. 2010-22043 Filed 9-2-10; 8:45 am]