Federal regulations · Through 2026-08-25 · Newer source version available

21 CFR 526.365: Cephapirin sodium.

(a) Specifications. Each single-dose, 10-milliliter syringe contains 200 milligrams (mg) cephapirin sodium activity.
(b) Sponsor. See No. 000010 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.115 of this chapter.
(d) Conditions of use in lactating cows—(1) Amount. Infuse the contents of one syringe (200 mg cephapirin activity) into each infected quarter immediately after the quarter has been completely milked out. Do not milk out for 12 hours. Repeat once only in 12 hours.
(2) Indications for use. For the treatment of mastitis in lactating cows caused by susceptible strains of Streptococcus agalactiae and Staphylococcus aureus including strains resistant to penicillin.
(3) Limitations. Milk that has been taken from animals during treatment and for 96 hours after the last treatment must not be used for food. Treated animals must not be slaughtered for food until 4 days after the last treatment. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Where this section sits in the code

Title 21—Food and Drugs
CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS
PART 526—INTRAMAMMARY DOSAGE FORM NEW ANIMAL DRUGS

(a) Specifications. Each single-dose, 10-milliliter syringe contains 200 milligrams (mg) cephapirin sodium activity.

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

(d) Conditions of use in lactating cows—(1) Amount. Infuse the contents of one syringe (200 mg cephapirin activity) into each infected quarter immediately after the quarter has been completely milked out. Do not milk out for 12 hours. Repeat once only in 12 hours.

(2) Indications for use. For the treatment of mastitis in lactating cows caused by susceptible strains of Streptococcus agalactiae and Staphylococcus aureus including strains resistant to penicillin.

(3) Limitations. Milk that has been taken from animals during treatment and for 96 hours after the last treatment must not be used for food. Treated animals must not be slaughtered for food until 4 days after the last treatment. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Collected 2026-08-27T02:24:47Z. Source file · JSON

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