Section 522.2444b - Thiopental and pentobarbital powder for injection(a)Specifications. Each gram of powder contains 750 milligrams (mg) of sodium thiopental and 250 mg of sodium pentobarbital powder for dilution with sterile water for injection.(b)Sponsor. See No. 061133 in § 510.600(c) of this chapter.(c)Conditions of use - (1)Amount. For total anesthesia, it is given at approximately 10 to 12 mg per pound of body weight over a period of 3.5 to 5 minutes. When preanesthetic medication is used, wait at least an hour before administering thiopental and sodium pentobarbital for injection, and the dosage necessary for anesthesia is reduced. Usually 1/2 to 2/3 the normal amount is adequate.(2)Indications for use. It is used as an anesthetic for intravenous administration to dogs and cats during short to moderately long surgical procedures.(3)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian. 79 FR 16197 , Mar. 25, 2014, as amended at 84 FR 8974 , Mar. 13, 2019 As amended at 84 FR 8974, 3/13/2019