21 CFR § 558.600 - Thiabendazole.
(a) Specifications. Mineral protein block containing 3.3 percent thiabendazole.
(b) Sponsor. See No. 012286 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.730 of this chapter.
(d) Special considerations. See § 500.25 of this chapter.
(e) Conditions of use in cattle—(1) Amount. Provide free-choice to cattle on pasture or range accustomed to mineral protein block feeding for 3 days. Cattle should consume at a recommended level of 0.11 pound per 100 pounds of body weight per day. Animals maintained under conditions of constant worm exposure may require re-treatment within 2 to 3 weeks.
(2) Indications for use. For control of infections of gastrointestinal roundworms (Trichostrongylus, Haemonchus, Ostertagia, and Cooperia).
(3) Limitations. 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.