StacksVerified U.S. regulatory reference

21 CFR §522.1465

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Specifications. Each milliliter of solution contains 50 milligrams of naltrexone hydrochloride.
  2. (b)Sponsor. See 053923 in § 510.600(c) of this chapter.
  3. (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.
    1. (2)Indications for use. As an antagonist to carfentanil citrate immobilization in free-ranging or confined elk and moose (Cervidae).
    2. (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.