---
kind: "section"
citation: "21 C.F.R. § 520.1320"
title: "21"
number: "520.1320"
heading: "Mebendazole."
url: "https://uscodex.org/cfr/21/520.1320"
---

# §520.1320. Mebendazole.

- (a) **Specifications.**
  - (1) Each gram of powder contains either 40 or 166.7 milligrams of mebendazole.
  - (2) **Each gram of paste contains 200 milligrams of mebendazole.**
  - (3) Each milliliter of suspension contains 33.3 milligrams of mebendazole.
- (b) **Sponsor.** See No. 000061 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use—**
  - (1) **Horses—**
    - (i) **Amount.** 1 gram of mebendazole per 250 pounds of body weight per dose, as an oral powder, paste or suspension.
    - (ii) **Indications for use.** For treatment of infections caused by large roundworms (Parascaris equorum); large strongyles (Strongylus edentatus, S. equinus, S. vulgaris); small strongyles; and mature and immature (4th larval stage) pinworms (Oxyuris equi).
    - (iii) **Limitations.** The drug is compatible with carbon disulfide. Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
  - (2) **Dogs—**
    - (i) **Amount.** Administer 100 milligrams of mebendazole per 10 pounds of body weight, once daily for 3 days, as an oral powder by mixing with a small quantity of food, preferably before the regular meal.
    - (ii) **Indications for use.** The drug is used for treatment of infections of roundworms (Toxocara canis), hookworms (Ancylostoma caninum, Uncinaria stenocephala), whipworms (Trichuris vulpis), and tapeworms (Taenia pisiformis).
    - (iii) **Limitations.** Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[78 FR 28823, May 20, 2014]

### Authority

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

### Source

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

### Amendments

[78 FR 28823, May 20, 2014]