subchapter_subject: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_code: "520"
part_subject: "ORAL DOSAGE FORM NEW ANIMAL DRUGS"
subpart_code: "B"
subpart_subject: "Specific Administrative Rulings and Decisions"
section_number: "520.2473b"
section_subject: "Tioxidazole paste."
cfr_reference: "21 CFR 520.2473b"
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. Each plastic syringe contains 6.25 grams of tioxidazole.
(b)Sponsor. See No. 000061 in § 510.600(c) of this chapter.
(c)Conditions of use—(1) Horses—(i) Amount. 5 milligrams of tioxidazole per pound of body weight as a single dose.
(ii)Indications for use. Removal of mature large strongyles (Strongylus edentatus, S. equinus, and S. vulgaris), mature ascarids (Parascaris equorum), mature and immature (4th larval stage) pinworms (Oxyuris equi), and mature small strongyles (Triodontophorus spp.).
(iii)Limitations. Administer orally by inserting the nozzle of the syringe through the space between front and back teeth and deposit the required dose on the base of the tongue. Before dosing, make sure the horse's mouth contains no feed. Not for use in horses intended for food. The reproductive safety of tioxidazole in breeding animals has not been determined. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism. It is recommended that this drug be administered with caution to sick or debilitated horses.