---
kind: "section"
citation: "21 C.F.R. § 520.2042"
title: "21"
number: "520.2042"
heading: "Pyrantel pamoate tablets."
url: "https://uscodex.org/cfr/21/520.2042"
---

# §520.2042. Pyrantel pamoate tablets.

- (a) **Specifications.** Each tablet contains pyrantel pamoate equivalent to 22.7, 45.4, or 113.5 milligrams of pyrantel base.
- (b) **Sponsor.** See No. 017135 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use.** It is used for dogs as follows:
  - (1) **Amount.** For dogs weighing over 5 pounds, use at least 2.27 milligrams of pyrantel base per pound of body weight; for dogs weighing 5 pounds or less, use at least 4.54 milligrams of pyrantel base per pound of body weight.
  - (2) **Indications for use.** For removal and control of large roundworms (ascarids) (Toxocara canis and Toxascaris leonina), and hookworms (Ancylostoma caninum and Uncinaria stenocephala).
  - (3) **Limitations.** Administer orally directly or in a small amount of food. To prevent reinfection of T. canis in puppies, lactating bitches after whelping, and adult dogs; treat puppies 2, 3, 4, 6, 8, and 10 weeks of age; treat lactating bitches 2 to 3 weeks after whelping; routinely treat adult dogs monthly. Do not withhold food prior to or after treatment. The presence of these parasites should be confirmed by laboratory fecal examination. A followup fecal examination should be conducted 2 to 4 weeks after first treatment regimen to determine the need for re-treatment. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism.

## Notes

### Amendments

[43 FR 52700, Nov. 14, 1978, as amended at 49 FR 22073, May 25, 1984; 57 FR 48163, Oct. 22, 1992; 58 FR 44611, Aug. 24, 1993]

### Authority

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

### Source

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

### Amendments

[43 FR 52700, Nov. 14, 1978, as amended at 49 FR 22073, May 25, 1984; 57 FR 48163, Oct. 22, 1992; 58 FR 44611, Aug. 24, 1993]