21 CFR § 520.600 - Dichlorvos capsules and pellets.

---
identifier: "/us/cfr/t21/s520.600"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 520.600 - Dichlorvos capsules and pellets."
title_number: 21
title_name: "Food and Drugs"
section_number: "520.600"
section_name: "Dichlorvos capsules and pellets."
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"
---


# 520.600 Dichlorvos capsules and pellets.

(a) *Specifications.* Each capsule contains 2.27 milligrams (mg) (4 percent) dichlorvos.

(b) *Sponsor.* See No. 069043 in § 510.600(c) of this chapter.

(c) *Conditions of use in dogs*—(1) *Amount.* Administer any combination of capsules and/or pellets so that the animal receives a single dose equaling 12 to 15 mg of dichlorvos per pound of body weight.

(2) *Indications for use.* For removal of *Toxocara canis* and *Toxascaris leonina* (roundworms), *Ancylostoma caninum* and *Uncinaria stenocephala* (hookworms), and *Trichuris vulpis* (whipworm) residing in the lumen of the gastrointestinal tract.

(3) *Limitations.* Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[83 FR 48945, Sept. 28, 2018]