21 CFR § 520.2362 - Thenium closylate.

---
identifier: "/us/cfr/t21/s520.2362"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 520.2362 - Thenium closylate."
title_number: 21
title_name: "Food and Drugs"
section_number: "520.2362"
section_name: "Thenium closylate."
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"
---


# 520.2362 Thenium closylate.

(a) *Specifications.* Each tablet contains thenium closylate equivalent to 500 milligrams thenium base.

(a) *Specifications.* Thenium closylate tablets contain thenium closylate equivalent to 500 milligrams thenium as base in each tablet.

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

(c) *Conditions of use in dogs*—(1) *Amount.* Dogs weighing over 10 pounds: Administer 1 tablet as a single dose. Dogs weighing 5 to 10 pounds: Administered one-half tablet twice during a single day. Repeat treatment after 2 or 3 weeks.

(2) *Indications for use.* For treatment of canine ancylostomiasis by the removal from the intestines of the adult forms of the species *Ancylostoma caninum* and *Uncinaria stenocephala* (hookworms).

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

[40 FR 13838, Mar. 27, 1975, as amended at 41 FR 53477, Dec. 7, 1976; 46 FR 48642, Oct. 2, 1981; 61 FR 8873, Mar. 6, 1996; 62 FR 61625, Nov. 19, 1997; 79 FR 28832, May 20, 2014]