---
kind: "section"
citation: "21 C.F.R. § 558.115"
title: "21"
number: "558.115"
heading: "Carbadox."
url: "https://uscodex.org/cfr/21/558.115"
---

# §558.115. Carbadox.

- (a) **Approvals.** Type A medicated articles: 2.2. percent (10 grams per pound) to 066104 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (b) **Related tolerances.** See [§ 556.100](/cfr/21/556.100.md) of this chapter.
- (c) **Special considerations.** Do not use in Type B or Type C medicated feeds containing bentonite.
- (d) **Conditions of use.** It is used for swine as follows:
  - (1) **Amount per ton.** 10-25 grams (0.0011-0.00275 percent).
    - (i) **Indications for use.** For increase in rate of weight gain and improvement of feed efficiency.
    - (ii) **Limitations.** Not for use in pregnant swine or swine intended for breeding purposes. Do not feed to swine within 42 days of slaughter.
  - (2) **Amount per ton.** 50 grams (0.0055 percent).
    - (i) **Indications for use.** For control of swine dysentery (vibrionic dysentery, bloody scours, or hemorrhagic dysentery); control of bacterial swine enteritis (salmonellosis or necrotic enteritis caused by Salmonella choleraesuis); increased rate of weight gain and improved feed efficiency.
    - (ii) **Limitations.** Not for use in pregnant swine or swine intended for breeding purposes. Do not feed to swine within 42 days of slaughter.
  - (3) **Amount per ton.** Carbadox 50 grams (0.0055 percent) plus pyrantel tartrate, 96 grams (0.0106 percent).
    - (i) **Indications for use.** For control of swine dysentery (vibrionic dysentery, bloody scours, or hemorrhagic dysentery); control of bacterial swine enteritis (salmonellosis or necrotic enteritis caused by Salmonella choleraesuis); aid in the prevention of migration and establishment of large roundworm (Ascaris suum) infections; aid in the prevention of establishment of nodular worm (Oesophagostomum) infections.
    - (ii) **Limitations.** Do not feed to swine over 75 pounds; do not feed within 10 weeks of slaughter; consult a veterinarian before feeding to severely debilitated animals; feed continuously as sole ration. Do not use in complete feeds containing less than 15 percent crude protein.
  - (4) Carbadox may also be used in combination with oxytetracycline as in [§ 558.450](/cfr/21/558.450.md).

## Notes

### Amendments

[40 FR 13959, Mar. 27, 1975, as amended at 40 FR 45164, Oct. 1, 1975; 40 FR 57798, Dec. 12, 1975; 42 FR 761, Jan. 4, 1977; 51 FR 7396, Mar. 3, 1986; 63 FR 59216, Nov. 3, 1998; 66 FR 47963, Sept. 17, 2001; 69 FR 51173, Aug. 18, 2004; 82 FR 21691, May 10, 2017]

### Authority

Authority: 21 U.S.C. 354, 360b, 360ccc, 360ccc-1, 371.

### Source

Source: 40 FR 13959, Mar. 27, 1975, unless otherwise noted.

### Amendments

[40 FR 13959, Mar. 27, 1975, as amended at 40 FR 45164, Oct. 1, 1975; 40 FR 57798, Dec. 12, 1975; 42 FR 761, Jan. 4, 1977; 51 FR 7396, Mar. 3, 1986; 63 FR 59216, Nov. 3, 1998; 66 FR 47963, Sept. 17, 2001; 69 FR 51173, Aug. 18, 2004; 82 FR 21691, May 10, 2017]