Section 520.1962 - Promazine(a)Specifications. Conforms to N.F. XII for promazine hydrochloride.(b)Sponsor. See No. 054771 in § 510.600(c) of this chapter.(c)Conditions of use in horses - (1)Amount. Administer 0.45 to 0.9 milligrams per pound of body weight mixed with an amount of feed that will be readily consumed.(2)Indications for use. For quieting excitable, unruly, or intractable horses.(3)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 28827 , May 20, 2014