21 CFR § 520.903a - Febantel paste.

---
identifier: "/us/cfr/t21/s520.903a"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 520.903a - Febantel paste."
title_number: 21
title_name: "Food and Drugs"
section_number: "520.903a"
section_name: "Febantel paste."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "520"
part_name: "ORAL DOSAGE FORM NEW ANIMAL DRUGS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 360b."
regulatory_source: "40 FR 13838, Mar. 27, 1975, unless otherwise noted."
cfr_part: "520"
---


# 520.903a Febantel paste.

(a) *Specifications.* Each gram of paste contains 455 milligrams (45.5 percent) febantel.

(b) *Sponsor.* See No. 058198 in § 510.600(c) of this chapter.

(c) *Conditions of use in horses*—(1) *Amount.* Administer paste orally at 6 milligrams per kilogram (2.73 milligrams per pound) of body weight on the base of the tongue or well mixed into a portion of the normal grain ration. For animals maintained on premises where reinfection is likely to occur, retreatment may be necessary. For most effective results, retreat in 6 to 8 weeks.

(2) *Indications for use.* For removal of large strongyles (*Strongylus vulgaris, S. edentatus,* *S. equinus*); ascarids (*Parascaris equorum*—sexually mature and immature); pinworms (*Oxyuris equi*—adult and 4th stage larva); and various small strongyles in horses, foals, and ponies.

(3) *Limitations.* Do not use in horses intended for human consumption. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism.

[79 FR 28821, May 20, 2014, as amended at 86 FR 14818, Mar. 19, 2021]