Federal regulations · Through 2026-08-25 · Newer source version available

21 CFR 520.905d: d Fenbendazole powder.

(a) Specifications. Each 2-ounce packet contains 2.27 grams (4 percent) fenbendazole.
(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.275 of this chapter.
(d) Conditions of use. It is administered to swine as follows:
(1) Amount. 3 milligrams fenbendazole per kilogram body weight per day (1.36 milligrams per pound per day).
(2) Indications for use. For removal and control of large roundworms (Ascaris suum); lungworms (Metastrongylus apri); nodular worms (Oesophagostomum dentatum, O. quadrispinulatum); small stomach worms (Hyostrongylus rubidus); whipworms (Trichuris suis); and kidneyworms (Stephanurus dentatus— mature and immature).
(3) Limitations. Thoroughly mix the contents of the packet(s) with swine ration and administer according to label directions. Feed as sole ration for 3 consecutive days. Can be fed to pregnant sows. No prior withdrawal of feed or water is necessary. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism.

Where this section sits in the code

Title 21—Food and Drugs
CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS
PART 520—ORAL DOSAGE FORM NEW ANIMAL DRUGS

(a) Specifications. Each 2-ounce packet contains 2.27 grams (4 percent) fenbendazole.

(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.

(d) Conditions of use. It is administered to swine as follows:

(1) Amount. 3 milligrams fenbendazole per kilogram body weight per day (1.36 milligrams per pound per day).

(2) Indications for use. For removal and control of large roundworms (Ascaris suum); lungworms (Metastrongylus apri); nodular worms (Oesophagostomum dentatum, O. quadrispinulatum); small stomach worms (Hyostrongylus rubidus); whipworms (Trichuris suis); and kidneyworms (Stephanurus dentatus— mature and immature).

(3) Limitations. Thoroughly mix the contents of the packet(s) with swine ration and administer according to label directions. Feed as sole ration for 3 consecutive days. Can be fed to pregnant sows. No prior withdrawal of feed or water is necessary. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism.

Collected 2026-08-27T02:24:47Z. Source file · JSON

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