---
kind: "section"
citation: "21 C.F.R. § 520.1242f"
title: "21"
number: "520.1242f"
heading: "Levamisol gel."
url: "https://uscodex.org/cfr/21/520.1242f"
---

# §520.1242f. Levamisol gel.

- (a) **Specifications.** Each gram of gel contains 115 milligrams (11.5 percent) levamisol hydrochloride.
- (b) **Sponsor.** See No. 054771 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Related tolerances.** See [§ 556.350](/cfr/21/556.350.md) of this chapter.
- (d) **Conditions of use—**
  - (1) **Cattle—**
    - (i) **Amount.** Eight milligrams of levamisole hydrochloride per kilogram of body weight, as a single oral dose.
    - (ii) **Indications for use.** Anthelmintic effective against the following nematode infections: Stomach worms (Haemonchus, Trichostrongylus, Ostertagia), intestinal worms (Trichostrongylus, Cooperia, Nematodirus, Bunostomum, Oesophagostomum), and lungworms (Dictyocaulus).
    - (iii) **Limitations.** Conditions of constant helminth exposure may require re-treatment within 2 to 4 weeks after the first treatment; do not administer to cattle within 6 days of slaughter for food; do not administer to dairy animals of breeding age; consult veterinarian before using in severely debilitated animals.
  - (2) **Breeding swine—**
    - (i) **Amount.** Eight milligrams per kilogram of body weight (3.6 milligrams per pound) as a single oral dose.
    - (ii) **Conditions of use.** For treating breeding swine infected with the following nematodes: Large roundworms (Ascaris suum), nodular worms (Oesophagostomum spp.), lungworms (Metastrongylus spp.), intestinal threadworms (Strongyloides ransomi), and kidney worms (Stephanurus dentatus).
    - (iii) **Limitations.** May require retreatment in 4 to 5 weeks. Do not use within 11 days of slaughter for food. Consult your veterinarian for assistance before using in severely debilitated animals and in the diagnosis, treatment, and control of parasitism.

## Notes

### Amendments

[47 FR 22517, May 25, 1982; 47 FR 30242, July 13, 1982, as amended at 48 FR 11429, Mar. 18, 1983; 51 FR 29215, Aug. 15, 1986; 67 FR 63055, Oct. 10, 2002; 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

[47 FR 22517, May 25, 1982; 47 FR 30242, July 13, 1982, as amended at 48 FR 11429, Mar. 18, 1983; 51 FR 29215, Aug. 15, 1986; 67 FR 63055, Oct. 10, 2002; 78 FR 28823, May 20, 2014]