21 CFR § 520.955Chapter I

§ 520.955 Florfenicol.

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Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.

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Specifications.(a) Each milliliter (mL) contains 23 milligrams (mg) florfenicol.

Sponsors.(b) See Nos. 000061, 054925, and 058198 in § 510.600(c) of this chapter.

Related tolerances.(c) See § 556.283 of this chapter.

Conditions of use in swineAmount.ad libitum(d) —(1) Administer in drinking water at 400 mg per gallon (100 parts per million (ppm)) for 5 consecutive days.

Indications for use.Actinobacillus pleuropneumoniae, Pasteurella multocida, Salmonella choleraesuisStreptococcus suis.(2) For the treatment of swine respiratory disease (SRD) associated with and

Limitations.(3) Do not slaughter within 16 days of last treatment. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[67 FR 78357, Dec. 24, 2002, as amended at 72 FR 262, Jan. 4, 2007; 78 FR 52854, Aug. 27, 2013; 82 FR 12169, Mar. 1, 2017]

eCFR data current as of: June 10, 2026

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.