21 CFR § 526.464Chapter I

§ 526.464 Cloxacillin benzathine.

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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 single-dose, 7.5- or 10-milliliter syringe contains cloxacillin benzathine equivalent to 500 milligrams (mg) cloxacillin.

Sponsor.(b) See No. 000010 in § 510.600(c) of this chapter.

Related tolerances.(c) See § 556.165 of this chapter.

Conditions of use in dry cowsAmount(d) —(1) . Infuse the contents of one syringe (equivalent to 500 mg cloxacillin) into each quarter immediately after last milking, but no later than 30 days before calving.

Indications for use.Staphylococcus aureusStreptococcus agalactiae(2) For the treatment of mastitis caused by and including penicillin resistant strains in dairy cows during the dry period.

Limitations.(3) Animals infused with this product must not be slaughtered for food until 30 days after the latest infusion. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[86 FR 13186, Mar. 8, 2021]

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.