§ 520.905c Fenbendazole paste.

Specifications.(a) Each gram of paste contains 100 milligrams (mg) fenbendazole (10 percent).

Sponsor.(b) See No. 000061 in § 510.600(c) of this chapter.

Related tolerances.(c) See § 556.275 of this chapter.

Special considerations.(d) See § 500.25 of this chapter.

Conditions of useHorsesIndications for use and amounts.Strongylus edentatus, S. equinus,S. vulgarisOxyuris equi(e) —(1) —(i) (A) For the treatment and control of large strongyles ( ), small strongyles, and pinworms (). For large strongyles, small strongyles, and pinworms, the recommended dose is 5 mg/kg (2.3 mg/lb).

Parascaris equorum(B) For treatment and control of ascarids (). For ascarids, the recommended dose is 10 mg/kg (4.6 mg/lb).

Strongylus vulgaris(C) For treatment and control of hypobiotic (encysted early third-stage), late third-stage, and fourth-stage cyathostome larvae, as well as fourth-stage larvae, the recommended dose is 10 mg/kg (4.6 mg/lb) daily for 5 consecutive days.

Strongylus vulgaris(D) For the control of arteritis caused by fourth-stage larvae of in horses.

(E) Fenbendazole paste 10 percent may be used concomitantly with approved forms of trichlorfon for the indications provided in paragraph (e)(1)(i)(A) of this section and for treating infections of stomach bots as provided in § 520.2520.

Limitations.(ii) Do not use in horses intended for human consumption.

Beef and dairy cattleAmount.(2) —(i) Administer orally 2.3 mg/lb (5 mg/kg) body weight.

Indications for use.Dictyocaulus viviparusOstertagia ostertagiHaemonchus contortusH. placeiTrichostrongylus axeiBunostomum phlebotomumNematodirus helvetianusCooperia punctataC. oncophoraTrichostrongylus colubriformisOesophagostomum radiatum(ii) For the treatment and control of: Lungworms: Adult (); Stomach worms: Adult brown stomach worms (), adult and fourth-stage larvae barberpole worms (), fourth-stage larvae barberpole worms (), and adult and fourth-stage larvae small stomach worms (); Intestinal worms (adult and fourth-stage larvae): Hookworms (), thread-necked intestinal worms (), small intestinal worms ( and ), bankrupt worms (), and nodular worms ().

Limitations.(iii) Milk taken during treatment and for 96 hours after the last treatment must not be used for human consumption. Cattle must not be slaughtered for human consumption within 8 days following last treatment with this drug product. Not for use in beef calves less than 2 months of age, dairy calves, and veal calves. A withdrawal period has not been established for this product in preruminating calves.

[72 FR 24185, May 2, 2007, as amended at 74 FR 61516, Nov. 25, 2009; 76 FR 17337, Mar. 29, 2011; 86 FR 57996, Oct. 20, 2021; 87 FR 10968, Feb. 28, 2022]