---
kind: "section"
citation: "21 C.F.R. § 520.905b"
title: "21"
number: "520.905b"
heading: "Fenbendazole granules."
url: "https://uscodex.org/cfr/21/520.905b"
---

# §520.905b. Fenbendazole granules.

- (a) **Specifications.** Each gram of granules contains 222 milligrams (mg) fenbendazole.
- (b) **Sponsor.** See No. 000061 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Special considerations.** See [§ 500.25](/cfr/21/500.25.md) of this chapter.
- (d) **Conditions of use—**
  - (1) **Horses—**
    - (i) **Amount.** 5 mg/kilogram (kg) for large strongyles, small strongyles, and pinworms; 10 mg/kg for ascarids.
    - (ii) **Indications for use.** For the control of infections of large strongyles (Strongylus edentatus, S. equinus, S. vulgaris), small strongyles, pinworms (Oxyuris equi), and ascarids (Parascaris equorum).
    - (iii) **Limitations.** Sprinkle the appropriate amount of drug on a small amount of the usual grain ration. Prepare for each horse individually. Withholding feed or water is not necessary. Retreat in 6 to 8 weeks if required. Do not use in horses intended for food.
  - (2) **Dogs—**
    - (i) **Amount.** 50 mg/kg daily for 3 consecutive days.
    - (ii) **Indications for use.** For the treatment and control of ascarids (Toxocara canis, Toxascaris leonina), hookworms (Ancylostoma caninum, Uncinaria stenocephala), whipworms (Trichuris vulpis), and tapeworms (Taenia pisiformis).
    - (iii) **Limitations.** Mix the appropriate amount of drug with a small amount of the usual food; dry dog food may require slight moistening to facilitate mixing. Medicated food must be fully consumed.
  - (3) **Zoo and wildlife animals—**
    - (i) **Amount.** 10 mg/kg per day for 3 days.
    - (ii) **Indications for use.** For control of internal parasites of Felidae and Ursidae as follows:
      - (A) **Lion (<I>Panthera leo</I>) and Tiger (<I>Panthera tigris</I>)—** Ascarid (Toxocara cati, Toxascaris leonina), Hookworm (Ancylostoma spp.).
      - (B) **Cheetah (<I>Acinonyx jubatus</I>)—** Ascarid (Toxocara cati, Toxascaris leonina).
      - (C) Puma (Felis concolor), Panther (Panthera spp.), Leopard (Panthera pardus), Jaguar (Panthera onca): Ascarid (Toxocara cati, Toxascaris leonina), Hookworm (Ancylostoma spp.), Tapeworm (Taenia hydatigena, T. krabbei, T. taeniaeformis).
      - (D) **Black Bear (<I>Ursus americanus</I>)—** Ascarid (Baylisascaris transfuga, Toxascaris leonina), Hookworm (Ancylostoma caninum), Tapeworm (Taenia hydatigena, T. krabbei).
      - (E) **Polar Bear (<I>Ursus maritimus</I>) and Grizzly Bear (<I>Ursus horribilis</I>)—** Ascarid (Baylisascaris transfuga, Toxascaris leonina).
    - (iii) **Limitations.** Top dress or mix with a small portion of food. Must be fully consumed prior to feeding. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Do not use 14 days before or during the hunting season.

## Notes

### Amendments

[44 FR 1375, Jan. 5, 1979, as amended at 47 FR 15327, Apr. 9, 1982; 48 FR 50528, Nov. 2, 1983; 59 FR 35252, July 11, 1994; 66 FR 47960, Sept. 17, 2001; 67 FR 47450, July 19, 2002; 71 FR 19429, Apr. 14, 2006; 74 FR 61516, Nov. 25, 2009]

### Authority

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

### Source

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

### Amendments

[44 FR 1375, Jan. 5, 1979, as amended at 47 FR 15327, Apr. 9, 1982; 48 FR 50528, Nov. 2, 1983; 59 FR 35252, July 11, 1994; 66 FR 47960, Sept. 17, 2001; 67 FR 47450, July 19, 2002; 71 FR 19429, Apr. 14, 2006; 74 FR 61516, Nov. 25, 2009]