Section 520.905d - 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.49 FR 18090, Apr. 27, 1984, as amended at 49 FR 20485, May 15, 1984; 66 FR 47960 , Sept. 17, 2001; 70 FR 32489 , June 3, 2005; 74 FR 61516 , Nov. 25, 2009; 83 FR 48945 , Oct. 9, 2018