21 CFR § 522.728 - Dipyrone.

---
identifier: "/us/cfr/t21/s522.728"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 522.728 - Dipyrone."
title_number: 21
title_name: "Food and Drugs"
section_number: "522.728"
section_name: "Dipyrone."
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: "522"
part_name: "IMPLANTATION OR INJECTABLE 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 13858, Mar. 27, 1975, unless otherwise noted."
cfr_part: "522"
---


# 522.728 Dipyrone.

(a) *Specifications.* Each milliliter of solution contains 500 milligrams (mg) dipyrone.

(b) *Sponsor.* See No. 043264 in § 510.600(c) of this chapter.

(c) *Conditions of use in horses*—(1) *Amount.* Administer 30 mg per kilogram of body weight (13.6 mg per pound) by intravenous injection, once or twice daily at a 12-hour interval for up to 3 days.

(2) *Indications for use.* For control of pyrexia in horses.

(3) *Limitations.* Do not use in horses intended for human consumption. Do not use in any food-producing animals, including lactating dairy animals. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[85 FR 18119, Apr. 1, 2020, as amended at 88 FR 14898, Mar. 10, 2023]