---
kind: "section"
citation: "21 C.F.R. § 520.2611"
title: "21"
number: "520.2611"
heading: "Trimethoprim and sulfadiazine paste."
url: "https://uscodex.org/cfr/21/520.2611"
---

# §520.2611. Trimethoprim and sulfadiazine paste.

- (a) **Specifications.** Each gram (g) of paste contains 67 milligrams (mg) trimethoprim and 333 mg sulfadiazine.
- (b) **Sponsors.** See sponsors in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter:
  - (1) **No.** 054771 for product administered as in [paragraph (c)(1)(i)](#c-1-i) of this section.
  - (2) **No.** 000061 for product administered as in [paragraph (c)(1)(ii)](#c-1-ii) of this section.
- (c) **Conditions of use in horses—**
  - (1) **Amount.** Administer orally as a single daily dose for 5 to 7 days:
    - (i) 5 g of paste (335 mg trimethoprim and 1,665 mg sulfadiazine) per 150 pounds (68 kilograms) of body weight per day.
    - (ii) 3.75 g of paste (250 mg trimethoprim and 1,250 mg sulfadiazine) per 110 pounds (50 kilograms) of body weight per day.
  - (2) **Indications for use.** For use where systemic antibacterial action against sensitive organisms is required during treatment of acute strangles, respiratory infections, acute urogenital infections, and wound infections and abscesses.
  - (3) **Limitations.** Not for use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[71 FR 30802, May 31, 2006, as amended at 79 FR 28834, May 20, 2014]

### Authority

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

### Source

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

### Amendments

[71 FR 30802, May 31, 2006, as amended at 79 FR 28834, May 20, 2014]