subchapter_subject: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_code: "558"
part_subject: "NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS"
subpart_code: "B"
subpart_subject: "Specific New Animal Drugs for Use in Animal Feeds"
section_number: "558.258"
section_subject: "Fenbendazole."
cfr_reference: "21 CFR 558.258"
title_name: "Title 21"
title_subject: "Food and Drugs"
parts_covered: "Parts 500 to 599"
revised_date: "Revised as of April 1, 2019"
publication_date: "As of April 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
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(a)Specifications. Type A medicated articles: 4 percent (18.1 grams per pound (g/lb)), 8 percent (36.2 g/lb), and 20 percent (90.7 g/lb) fenbendazole.
(b)Approvals. See No. 000061 in § 510.600(c) of this chapter.
(c)Related tolerances. See § 556.275 of this chapter.
(d)Special considerations. See § 500.25 of this chapter.
(iii)Free-choice feeds—(A) Amount. 5 mg/kg body weight (2.27 mg/lb), including the following formulations:
(B)Indications for use. As in paragraph (e)(3)(i) of this section.
(C)Limitations. Feed a total of 5 mg of fenbendazole per kg (2.27 mg/lb) of body weight to cattle over a 3- to 6-day period. Retreatment may be needed after 4 to 6 weeks. Cattle must not be slaughtered within 13 days following last treatment. For dairy cattle the milk discard time is zero hours. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal.