21 C.F.R. § 520.1242g Levamisole resinate and famphur paste.
Title 21 - Food and Drugs
(a) Chemical name of famphur. O, O-Dimethyl O-[p-(dimethylsulfamoyl) phenyl] phosphorothioate. (b) Specifications. The drug is a paste containing 11.6 percent levamisole resinate (50 percent potency) and 23.6 percent famphur. (c) Sponsor. See 000061 in §510.600(c) of this chapter. (d) Special considerations. Do not use any cholinesterase-inhibiting drugs, pesticides, insecticides, or chemicals on cattle simultaneously or within a few days before or after treatment with this product. (e) Related tolerances. See §556.350 of this chapter for levamisole and §556.273 of this chapter for famphur. (f) Conditions of use in cattle—(1) Amount. 8 milligrams of levamisole hydrochloride (equivalent) and 30 milligrams of famphur activity per kilogram of body weight. (2) Indications for use. For treatment of cattle infected with the following parasites: Stomach worms (Haemonchus, Trichostrongylus, Ostertagia), intestinal worms (Trichostrongylus, Cooperia, Nematodirus, Bunostomum, Oesophagostomum), lungworms (Dictyocaulus), cattle grubs (Hypoderma), biting lice (Bovicola), and sucking lice (Linognathus, Solenoptes). (3) Limitations. Drug is not effective against lice eggs. Conditions of constant helminth and ectoparasitic exposure may require retreatment within 2 to 4 weeks after first treatment. Do not administer to cattle within 19 days of slaughter. Do not administer to dairy animals of breeding age. Do not use in calves less than 3 months old, or in debilitated animals. Do not treat Brahman bulls. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism. [53 FR 23757, June 24, 1988, as amended at 54 FR 1353, Jan. 13, 1989; 57 FR 7652, Mar. 4, 1992; 62 FR 55160, Oct. 23, 1997; 62 FR 61625, Nov. 19, 1997]
Title 21: Food and Drugs
PART 520—ORAL DOSAGE FORM NEW ANIMAL DRUGS
§ 520.1242g Levamisole resinate and famphur paste.
