21 C.F.R. § 520.1242f

Levamisol gel.

Last amended: 2016Year: 2026Length: 277 wordsSubsections: 4Official source

Cite as 21 C.F.R. § 520.1242f (2026)

(a) Specifications. Each gram of gel contains 115 milligrams (11.5 percent) levamisol hydrochloride. (b) Sponsor. See No. 054771 in § 510.600(c) of this chapter. (c) Related tolerances. See § 556.350 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. [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]
Cross-references to the CFR
510.600556.350
21 C.F.R. § 520.1242f: Levamisol gel. | Justis AI