Code of Federal Regulations Title 21. Food and Drugs § 21.520.905a Fenbendazole suspension

(i) Amount. Administer orally 5 mg per kilogram (/kg) (2.3 mg per pound (/lb)) for the control of large strongyles, small strongyles, and pinworms;  10 mg/kg for the control of ascarids.

(ii) Indications for use. For the control of large strongyles (Strongylus edentatus, S. equinus, S. vulgaris), small strongyles (Cyanthostomum spp., Cylicocyclus spp., Cylicostephanus spp., Triodontophorus spp.), pinworms (Oxyuris equi), and ascarids (Parascaris equorum) in horses.

(iii) Limitations. Administer by dose syringe or suitable plastic syringe. Do not use in horses intended for human consumption.

(i) Amount. Administer orally 5 mg/kg of body weight (2.3 mg/lb). Retreatment may be needed after 4 to 6 weeks.

(ii) Indications for use. 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 (Trichostongylus axei);  intestinal worms (adults and 4th–stage larvae)—hookworm (Bunostonmum phlebotomum), threadnecked intestinal worm (Nematodirus helvetianus), small intestinal worm (Cooperia punctata and C. oncophora), bankrupt worm (Trichostrongylus colubriformis), and nodular worm (Oesophagostomum radiatum).

(iii) Limitations. Cattle must not be slaughtered within 8 days following last treatment. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal.

(i) Amount. Administer orally 10 mg/kg of body weight (2.3 mg/lb). Retreatment may be needed after 4 to 6 weeks.

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

(iii) Limitations. Cattle must not be slaughtered within 8 days following last treatment. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

(i) Amount. Administer orally 5 mg/kg of body weight (2.3 mg/lb). Retreatment may be needed after 4 to 6 weeks.

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

(iii) Limitations. Goats must not be slaughtered for food within 6 days following last treatment. Do not use in lactating goats.

(i) Amount. Administer orally via drinking water at a daily dose of 1 mg/kg body weight (0.454 mg/lb) for 5 consecutive days.

(ii) Indications for use. For the treatment and control of adult Ascaridia galli in broiler chickens and replacement chickens, and for the treatment and control of adult A. galli and Heterakis gallinarum in breeding chickens and laying hens.

(i) Amount. Administer orally via the drinking water at a daily dose of 2.2 mg/kg of body weight (1.0 mg/lb) for 3 consecutive days.

(ii) Indications for use. For the treatment and control of:  Lungworms:  Adult Metastrongylus apri, Adult Metastrongylus pudendotectus;  Gastrointestinal worms:  Adult and larvae (L3, L4 stages, liver, lung, intestinal forms) large roundworms (Ascaris suum), Adult nodular worms (Oesophagostomum dentatum, O. quadrispinulatum), Adult small stomach worms (Hyostrongylus rubidus), Adult and larvae (L2, L3, L4 stages—intestinal mucosal forms) whipworms (Trichuris suis);  and Kidney worms:  Adult and larvae Stephanurus dentatus.

(iii) Limitations. Swine intended for human consumption must not be slaughtered within 2 days from the last treatment.