Section 520.2123c - Spectinomycin solution(a)Specifications. Each milliliter of solution contains spectinomycin dihydrochloride pentahydrate equivalent to 50 milligrams (mg) spectinomycin.(b)Sponsors. See Nos. 016592, 054771, and 061133 in § 510.600(c) of this chapter.(c)Related tolerances. See § 556.600 of this chapter.(d)Conditions of use in swine -(1)Amount. Administer 5 mg per pound (lb) of body weight orally twice daily for 3 to 5 days.(2)Indications for use. For the treatment and control of porcine enteric colibacillosis (scours) caused by E. coli susceptible to spectinomycin in pigs under 4 weeks of age.(3)Limitations. Do not administer to pigs over 15 lb body weight or over 4 weeks of age. Do not administer within 21 days of slaughter. Federal law restricts this drug to use by or on the order of a licensed veterinarian.73 FR 6607, Feb. 5, 2008, as amended at 78 FR 17596, Mar. 22, 2013; 79 FR 28828, May 20, 2014; 81 FR 22523, Apr. 18, 2016; 84 FR 8973, Mar. 13, 2019; 88 FR 14897, Mar. 10, 2023 81 FR 22523, 4/18/2016; 84 FR 8973, 3/13/2019; 88 FR 14897, 3/10/2023