Section 522.52 - Alfaxalone(a)Specifications. Each milliliter contains 10 milligrams (mg) alfaxalone.(b)Sponsor. See No. 054771 in § 510.600(c) of this chapter.(c)Conditions of use in cats and dogs -(1)Amount - (i)Cats - (A)Induction of general anesthesia. Administer by intravenous injection over approximately 60 seconds or until clinical signs show the onset of anesthesia, 2.2 to 9.7 mg/kilogram (kg) for cats that did not receive a preanesthetic or 1.0 to 10.8 mg/kg for cats that received a preanesthetic.(B)Maintenance of general anesthesia following induction. Administer an intravenous bolus containing 1.1 to 1.3 mg/kg to provide an additional 7 to 8 minutes of anesthesia in preanesthetized cats; a dose containing 1.4 to 1.5 mg/kg provides an additional 3 to 5 minutes anesthesia in unpreanesthetized cats.(ii)Dogs - (A)Induction of general anesthesia. Administer by intravenous injection over approximately 60 seconds or until clinical signs show the onset of anesthesia, 1.5 to 4.5 mg/kg for dogs that did not receive a preanesthetic or 0.2 to 3.5 mg/kg for dogs that received a preanesthetic.(B)Maintenance of general anesthesia following induction. Administer an intravenous bolus containing 1.2 to 1.4 mg/kg to provide an additional 6 to 8 minutes of anesthesia in preanesthetized dogs; a dose of 1.5 to 2.2 mg/kg provides an additional 6 to 8 minutes of anesthesia in unpreanesthetized dogs.(2)Indications for use. For the induction and maintenance of anesthesia and for induction of anesthesia followed by maintenance with an inhalant anesthetic, in dogs and cats.(3)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Alfaxalone is a Class IV controlled substance.77 FR 64717, Oct. 23, 2012, as amended at 79 FR 64116, Oct. 28, 2014; 88 FR 84700, Dec. 6, 2023