{"data":{"id":"us/21-cfr-520.905d","jurisdiction":"us","citation":"21 CFR 520.905d","heading":"d Fenbendazole powder.","body":"(a) Specifications. Each 2-ounce packet contains 2.27 grams (4 percent) fenbendazole.\n(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.\n(c) Related tolerances. See § 556.275 of this chapter.\n(d) Conditions of use. It is administered to swine as follows:\n(1) Amount. 3 milligrams fenbendazole per kilogram body weight per day (1.36 milligrams per pound per day).\n(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).\n(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.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"db3dd00785e6b474c2576ba9560c98ab872faf8fc37d10913d69968130e66a2f","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-520.905c","next":"us/21-cfr-520.928"},"notice":"GroundRules: Original legal text. Not legal advice."}