Section 522.1086 - Guaifenesin solution(a)Specifications. Each milliliter of solution contains 50 milligrams (mg) of guaifenesin and 50 mg of dextrose.(b)Sponsors. See Nos. 037990 and 058198 in § 510.600(c) of this chapter.(c)Conditions of use in horses - (1)Amount. Administer 1 milliliter per pound of body weight by rapid intravenous infusion.(2)Indications for use. For use as a skeletal muscle relaxant.(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 16189 , Mar. 25, 2014, as amended at 86 FR 14820 , Mar. 19, 2021