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U.S. Department of Health and Human Services

CFR - Code of Federal Regulations Title 21

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The information on this page is current as of Oct 01, 2021.

For the most up-to-date version of CFR Title 21, go to the Electronic Code of Federal Regulations (eCFR).

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[Code of Federal Regulations]
[Title 21, Volume 6]
[CITE: 21CFR520.2380a]



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

Sec. 520.2380a Thiabendazole top dressing and mineral protein block.

(a) Specifications. Conforms to N.F. XII.

(b) Sponsors. See sponsors in § 510.600(c) of this chapter for use as in paragraph (d) of this section.

(1) [Reserved]

(2) No. 000010 for use as in paragraph (d)(1)(ii) of this section.

(3) No. 012286 for use as in paragraph (d)(2) of this section.

(c) Related tolerances. See § 556.730 of this chapter.

(d) Conditions of use. It is used as follows:

(1) Horses. (i) [Reserved]

(ii) Route of administration. In feed.

(a ) Amount. 2 grams per 100 pounds of body weight.

(1 ) Indications for use. For control of large and small strongyles, Strongyloides, and pinworms of the genera Strongylus, Cyathostomum, Cylicobrachytus and related genera, Craterostomum, Oesophagodontus, Poteriostomum, Oxyuris, and Strongyloides.

(2 ) Limitations. Administer in a single dosage mixed with the normal grain ration given at one feeding. Warning: Not for use in horses intended for food.

(b ) Amount. 4 grams per 100 pounds of body weight.

(1 ) Indications for use. For control of ascarids of the genus Parascaris.

(2 ) Limitations. Administer in a single dosage mixed with the normal grain ration given at one feeding. Warning: Not for use in horses intended for food.

(2) Cattle - (i) Route of administration. In feed block.

(ii) Amount. 3.3 percent block consumed at the recommended level of 0.11 pound per 100 pounds of body weight per day.

(iii) Indications for use. For control of infections of gastrointestinal roundworms (Trichostrongylus, Haemonchus, Ostertagia and Cooperia ).

(iv) Limitations. Administer to cattle on pasture or range accustomed to mineral protein block feeding for 3 days. Milk taken from animals during treatment and within 96 hours (8 milkings) after the latest treatment must not be used for food. Do not treat cattle within 3 days of slaughter. For a satisfactory diagnosis, a microscopic fecal examination should be performed by a veterinarian or diagnostic laboratory prior to worming. Animals maintained under conditions of constant worm exposure may require re-treatment within 2 to 3 weeks. Animals that are severely parasitized, sick, or off feed should be isolated and a veterinarian consulted for advice concerning treatment.

[40 FR 13838, Mar. 27, 1975, as amended at 41 FR 9149, Mar. 3, 1976; 62 FR 63271, Nov. 28, 1997; 70 FR 32489, June 3, 2005; 73 FR 35340, June 23, 2008; 79 FR 28832, May 20, 2014; 83 FR 48946, Sept. 28, 2018; 84 FR 39183, Aug. 9, 2019]

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