21 CFR § 520.598 - Dichlorvos tablets.

---
identifier: "/us/cfr/t21/s520.598"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 520.598 - Dichlorvos tablets."
title_number: 21
title_name: "Food and Drugs"
section_number: "520.598"
section_name: "Dichlorvos tablets."
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"
---


# 520.598 Dichlorvos tablets.

(a) *Specifications.* Each tablet contains 2, 5, 10, or 20 milligrams (mg) dichlorvos.

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

(c) *Conditions of use in dogs, puppies, cats, and kittens*—(1) *Amount.* Administer orally at 5 mg dichlorvos per pound of body weight.

(2) *Indications for use*—(i) *Dogs and puppies:* Removal and control of intestinal roundworms (*Toxocara canis* and *Toxascaris leonina*) and hookworms (*Ancylostoma caninum* and *Uncinaria stenocephala*).

(ii) *Cats and kittens:* Removal and control of intestinal roundworms (*Toxocara cati* and *Toxascaris leonina*) and hookworms (*Ancylostoma tubaeforme* and *Uncinaria stenocephala*).

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

[83 FR 48945, Sept. 28, 2018]