---
kind: "section"
citation: "21 C.F.R. § 520.2123c"
title: "21"
number: "520.2123c"
heading: "Spectinomycin solution."
url: "https://uscodex.org/cfr/21/520.2123c"
---

# §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)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Related tolerances.** See [§ 556.600](/cfr/21/556.600.md) 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.

## Notes

### Amendments

[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]

### Authority

Authority: 21 U.S.C. 360b.

### Source

Source: 40 FR 13838, Mar. 27, 1975, unless otherwise noted.

### Amendments

[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]