Section 522.82 - Aminopropazine(a)Specifications. Each milliliter of solution contains aminopropazine fumarate equivalent to 25 milligrams (mg) aminopropazine base.(b)Sponsor. See No. 000061 in § 510.600(c) of this chapter.(c)Conditions of use - (1)Dogs and cats - (i)Amount. 1 to 2 mg per pound of body weight, repeated every 12 hours as indicated, by intramuscular or intravenous injection.(ii)Indications for use. For reducing excessive smooth muscle contractions, such as occur in urethral spasms associated with urolithiasis.(iii)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.(2)Horses - (i)Amount. Administer 0.25 mg per pound of body weight, repeated every 12 hours as indicated, by intramuscular or intravenous injection.(ii)Indications for use. For reducing excessive smooth muscle contractions, such as occur in colic spasms.(iii)Limitations. Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian. 79 FR 16183 , Mar. 25, 2014