{"data":{"id":"us/21-cfr-522.1465","jurisdiction":"us","citation":"21 CFR 522.1465","heading":"Naltrexone.","body":"(a) Specifications. Each milliliter of solution contains 50 milligrams of naltrexone hydrochloride.\n(b) Sponsor. See 053923 in § 510.600(c) of this chapter.\n(c) Conditions of use in elk and moose—(1) Amount. 100 milligrams of naltrexone hydrochloride for each milligram of carfentanil citrate administered. One-quarter of the dose should be administered intravenously and three-quarters of the dose should be administered subcutaneously.\n(2) Indications for use. As an antagonist to carfentanil citrate immobilization in free-ranging or confined elk and moose (Cervidae).\n(3) Limitations. Do not use in domestic food-producing animals. Do not use in free-ranging animals for 45 days before or during hunting season. Federal law restricts this drug to use by or on the order of a licensed veterinarian.","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 522—IMPLANTATION OR INJECTABLE 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":"6088e1bf0b3999ad9914662297844defcee463e47f44a24e604a8a5f9dcb115c","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-522.1452","next":"us/21-cfr-522.1468"},"notice":"GroundRules: Original legal text. Not legal advice."}