Regulations last checked for updates: Feb 11, 2026

Title 21 - Food and Drugs last revised: Dec 18, 2026
All TitlesTitle 21Chapter IPart 520 - PART 520—ORAL DOSAGE FORM NEW ANIMAL DRUGS
View all text of Part 520 [§ 520.23 - § 520.2654]
§ 520.1158 - Iodochlorhydroxyquin.

(a) Specifications. Each bolus contains 10 grams of iodochlorhydroxyquin.

(b) Sponsor. See No. 054771 in § 510.600 (c) of this chapter.

(c) Conditions of use—(1) Amount. 1 bolus (10 grams) daily for a 1,000-pound horse.

(2) Indications for use. For treatment of equine diarrhea.

(3) Limitations. Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[48 FR 8054, Feb. 25, 1983, as amended at 50 FR 41489, Oct. 11, 1985; 78 FR 28822, May 20, 2014]
authority: 21 U.S.C. 360b.
source: 40 FR 13838, Mar. 27, 1975, unless otherwise noted.
cite as: 21 CFR 520.1158
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