Section 522.1465 - Naltrexone(a)Specifications. Each milliliter of solution contains 50 milligrams of naltrexone hydrochloride.(b)Sponsor. See 053923 in § 510.600(c) of this chapter.(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.(2)Indications for use. As an antagonist to carfentanil citrate immobilization in free-ranging or confined elk and moose (Cervidae).(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.62 FR 5320, Feb. 5, 1997, as amended at 79 FR 16191 , Mar. 25, 2014