520.905a Fenbendazole suspension.

Specifications: The drug is a suspension containing 10 percent (100 milligrams per milliliter) fenbendazole.

Conditions of use:

Cattle (including dairy cattle of breeding age)

Amount: Administer orally 5 milligrams per kilogram of body weight (2.3 milligrams per pound).

Indications: For the removal and control of lungworm (Dictyocaulus viviparus); stomach worm (adults) brown stomach worm (Ostertagia ostertagi); stomach worms (adults and 4th-stage larvae); barberpole worm (Haemonchus contortus and H. placei) and small stomach worm (Trichostrongylus axei); intestinal worms (adults and 4th-stage larvae); hookworm (Bunostomum phlebotomum), threadnecked intestinal worm (Nematodirus helvetianus), small intestinal worm (Cooperia punctata and C. oncophora), bankrupt worm (Trichostrongylus colubriformis), and nodular worm (Oesophagostomum radiatum).

Limitations: Retreatment may be needed after 4 to 6 weeks. Cattle must not be slaughtered within 8 days following last treatment. Do not use in dairy cattle of breeding age. Consult a veterinarian for assistance in the diagnosis, treatment, and control of parasitism. Fenbendazole suspension 10 percent and approved forms of trichlorfon, when used concomitantly have been shown to be compatible and not to interfere with one another.

Cattle (beef)

Amount: Administer orally 10 milligrams per kilogram of body weight.

Indications: For the removal and control of stomach worm (4th-stage inhibited larvae/type II ostertagiasis), Ostertagia ostertagi and tapeworm, Moniezia benedeni.

Limitations. Retreatment may be needed after 4 to 6 weeks. Cattle must not be slaughtered within 8 days following last treatment. Do not use in dairy cattle of breeding age. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Fenbendazole suspension 10 percent and approved forms of trichlorfon, when used concomitantly have been shown to be compatible and not to interfere with one another.

Goats

Amount: Administer orally 5 milligrams per kilogram of body weight (2.3 milligrams per pound).

Indications: For the removal and control of stomach worms (adults) Haemonchus contortus and Teladorsagia circumcincta.

Limitations: Retreatment may be needed after 4 to 6 weeks. Goats must not be slaughtered within 6 days of last treatment. Do not use in lactating goats. Fenbendazole suspension 10 percent and approved forms of trichlorfon, when used concomitantly have been shown to be compatible and not to interfere with one another.

Tolerances for residues of fenbendazole in food are established as follows:

a. Cattle 1) Muscle. The tolerance for parent fenbendazole (the marker residue) is 0.4 ppm. 2) In milk. The tolerance for fenbendazole sulfoxide metabolite (the marker residue in cattle milk) is 0.6 ppm.

b. Swine 1) Liver (the target tissue). The tolerance for parent fenbendazole (the marker residue) is 6 ppm. 2) Muscle. The tolerance for parent fenbendazole (the marker residue) is 2 ppm.

c. Goats 1) Liver. The tolerance for parent fenbendazole (the marker residue) is 0.8 ppm. 1) Muscle. The tolerance for parent fenbendazole (the marker residue) is 0.4 ppm.

d. Turkeys 1) Liver. The tolerance for parent fenbendazole (the marker residue) is 6 ppm. 2) Muscle. The tolerance for parent fenbendazole (the marker residue) is 2 ppm.