---
kind: "section"
citation: "21 C.F.R. § 520.2471"
title: "21"
number: "520.2471"
heading: "Tilmicosin."
url: "https://uscodex.org/cfr/21/520.2471"
---

# §520.2471. Tilmicosin.

- (a) **Specifications.** Each milliliter of concentrate solution contains 250 milligrams (mg) tilmicosin as tilmicosin phosphate.
- (b) **Sponsors.** See Nos. 016592 and 058198 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Tolerances.** See [§ 556.735](/cfr/21/556.735.md) of this chapter.
- (d) **Conditions of use in swine—**
  - (1) **Amount.** Administer in drinking water at a concentration of 200 mg per liter for 5 consecutive days.
  - (2) **Indications for use.**
    - (i) For the control of swine respiratory disease associated with Pasteurella multocida and Haemophilus parasuis in groups of swine in buildings where a respiratory disease outbreak is diagnosed.
    - (ii) For the control of swine respiratory disease associated with Mycoplasma hyopneumoniae in the presence of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) in groups of swine in buildings where a respiratory disease outbreak is diagnosed.
  - (3) **Limitations.** Swine intended for human consumption must not be slaughtered within 7 days of the last treatment with this product. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[79 FR 18158, Apr. 1, 2014, as amended at 81 FR 17608, Mar. 30, 2016; 81 FR 48702, July 26, 2016; 87 FR 58962, Sept. 29, 2022]

### Authority

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

### Source

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

### Amendments

[79 FR 18158, Apr. 1, 2014, as amended at 81 FR 17608, Mar. 30, 2016; 81 FR 48702, July 26, 2016; 87 FR 58962, Sept. 29, 2022]