21 CFR § 524.390 - Chloramphenicol ophthalmic ointment.

---
identifier: "/us/cfr/t21/s524.390"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 524.390 - Chloramphenicol ophthalmic ointment."
title_number: 21
title_name: "Food and Drugs"
section_number: "524.390"
section_name: "Chloramphenicol ophthalmic ointment."
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: "524"
part_name: "OPHTHALMIC AND TOPICAL 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 13873, Mar. 27, 1975, unless otherwise noted."
cfr_part: "524"
---


# 524.390 Chloramphenicol ophthalmic ointment.

(a) *Specifications.* Each gram contains 10 milligrams chloramphenicol.

(b) *Sponsors.* See Nos. 043264 and 054771 in § 510.600(c) of this chapter.

(c) *Conditions of use in dogs and cats*—(1) *Amount.* Apply every 3 hours around the clock for 48 hours, after which night instillations may be omitted.

(2) *Indications for use.* For treatment of bacterial conjunctivitis caused by pathogens susceptible to chloramphenicol.

(3) *Limitations.* Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal law prohibits the use of this drug in food-producing animals.

[77 FR 4897, Feb. 1, 2012, as amended at 77 FR 64717, Oct. 23, 2012; 79 FR 10967, Feb. 27, 2014]