---
kind: "section"
citation: "21 C.F.R. § 520.2330"
title: "21"
number: "520.2330"
heading: "Sulfisoxazole tablets."
url: "https://uscodex.org/cfr/21/520.2330"
---

# §520.2330. Sulfisoxazole tablets.

- (a) **Specifications.** Each tablet contains 260 milligrams (4 grains) of sulfisoxazole.
- (b) **Sponsor.** See No. 054771 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use—**
  - (1) **Amount.** Administer one tablet orally per 4 pounds of body weight.
  - (2) **Indications for use.** Use in dogs and cats as an aid in treatment of bacterial pneumonia and bacterial enteritis when caused by organisms sensitive to sulfisoxazole.
  - (3) **Limitations.** Repeat dosage at 24-hour intervals until 2 to 3 days after disappearance of clinical symptoms. (Administration of one-half daily dosage at 12-hour intervals or one-third daily dosage at 8-hour intervals will provide a more constant blood level.) Provide adequate supply of drinking water. If symptoms persist after using this preparation for 2 or 3 days, consult a veterinarian. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[43 FR 60895, Dec. 29, 1978, as amended at 79 FR 28831, May 20, 2014; 87 FR 76421, Dec. 14, 2022]

### Authority

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

### Source

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

### Amendments

[43 FR 60895, Dec. 29, 1978, as amended at 79 FR 28831, May 20, 2014; 87 FR 76421, Dec. 14, 2022]