---
kind: "section"
citation: "21 C.F.R. § 520.2045"
title: "21"
number: "520.2045"
heading: "Pyrantel tartrate powder."
url: "https://uscodex.org/cfr/21/520.2045"
---

# §520.2045. Pyrantel tartrate powder.

- (a) **Specifications.** Each gram of powder contains 106 milligrams (10.6 percent) or 113 milligrams (11.3 percent) pyrantel tartrate.
- (b) **Sponsor.** See No. 054771 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter for use of 11.3 percent powder as in [paragraph (d)(1)](#d-1) and 10.6 percent powder as in [paragraph (d)(2)](#d-2) and of this section.
- (c) **Related tolerances.** See [§ 556.560](/cfr/21/556.560.md) of this chapter.
- (d) **Conditions of use—**
  - (1) **Horses—**
    - (i) **Amount.** Administer as a single dose at 0.57 gram of pyrantel tartrate per 100 pounds of body weight mixed with the usual grain ration. Do not administer by stomach tube or dose syringe.
    - (ii) **Indications for use.** For the removal and control of infections from the following mature parasites: Large strongyles (Strongylus vulgaris, S. edentatus, S. equinus), small strongyles (Trichonema spp., Triodontophorus), pinworms (Oxyuris), and large roundworms (Parascaris).
    - (iii) **Limitations.** Do not treat severely debilitated animals with this drug. Do not use in horses intended for human consumption.
  - (2) **Swine—**
    - (i) **Amount.** Add to feed at 0.4 gram pyrantel tartrate per pound of non-pelleted ration. The ration is administered as a single treatment as the sole ration at the rate of 1 pound per 40 pounds of animal weight for animals up to 200 pounds. Animals 200 pounds and over are administered 5 pounds of ration per animal.
    - (ii) **Indications for use.** For the removal and control of large roundworms (Ascaris suum) and nodular worm (Oesophagostomum) infections.
    - (iii) **Limitations.** Consult veterinarian before using in severely debilitated animals. Do not treat within 24 hours of slaughter.

## Notes

### Amendments

[79 FR 28827, May 20, 2014]

### Authority

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

### Source

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

### Amendments

[79 FR 28827, May 20, 2014]