{"data":{"id":"us/21-cfr-520.1120a","jurisdiction":"us","citation":"21 CFR 520.1120a","heading":"a Haloxon drench.","body":"(a) Specifications. Each packet contains 141.5 grams haloxon.\n(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.\n(c) Special considerations. Do not use any drug, insecticide, pesticide, or other chemical having cholinesterase-inhibiting activity either simultaneously or within a few days before or after treatment with haloxon.\n(d) Related tolerances. See § 556.310 of this chapter.\n(e) Conditions of use in cattle—(1) Amount. Dissolve each packet in 32 fluid ounces of water and administer as follows: For animals weighing up to 100 pounds: 1/2 fluid ounce; for animals weighing 100 to 150 pounds: 3/4 fluid ounce; for animals weighing 150 to 200 pounds: 1 fluid ounce; for animals weighing 200 to 300 pounds: 1 1/2 fluid ounces; for animals weighing 300 to 450 pounds: 2 fluid ounces; for animals weighing 450 to 700 pounds: 3 fluid ounces; for animals weighing 700 to 1,000 pounds: 4 fluid ounces; for animals weighing 1,000 to 1,200 pounds: 5 fluid ounces; for animals weighing over 1,200 pounds: 6 fluid ounces. Retreat in 3 to 4 weeks.\n(2) Indications for use. For control of gastrointestinal roundworms of the genera Haemonchus, Ostertagia, Trichostrongylus, and Cooperia.\n(3) Limitations. Do not treat dairy animals of breeding age. Do not treat within 1 week of slaughter.","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":"a459e0d7c2df9f57b4d81a26fb70f51f84f43a0aff7b0de44a80565dc385f98e","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-520.1120","next":"us/21-cfr-520.1120b"},"notice":"GroundRules: Original legal text. Not legal advice."}