21 C.F.R. § 526.1130 Hetacillin potassium for intramammary infusion.
Title 21 - Food and Drugs
(a) Specifications. Each 10 milliliter syringe contains hetacillin potassium equivalent of 62.5 milligrams of ampicillin. (b) Sponsor. See No. 000856 in §510.600(c) of this chapter. (c) Conditions of use. Lactating cows—(1) Amount. 10 milliliters of hetacillin potassium equivalent to 62.5 milligrams ampicillin into each infected quarter. Repeat at 24-hour intervals until a maximum of three treatments has been given. (2) Indications for use. Treating acute, chronic, or subclinical bovine mastitis in lactating cows caused by susceptible strains of Streptococcus agalactiae, Streptococcus dysgalactiae, Staphylococcus aureus, and Escherichia coli. (3) Limitations. If definite improvement is not noted within 48 hours after treatment, the causal organism should be further investigated. Milk that has been taken from animals during treatment and for 72 hours (6 milkings) after the latest treatment must not be used for food. Treated animals must not be slaughtered for food until 10 days after the latest treatment. Federal law restricts this drug to use by or on the order of a licensed veterinarian. [57 FR 37335, Aug. 18, 1992]
Title 21: Food and Drugs
PART 526—INTRAMAMMARY DOSAGE FORMS
§ 526.1130 Hetacillin potassium for intramammary infusion.
