PolyMast (hetacillin potassium) for Intramammary Infusion is indicated for the treatment of acute, chronic or subclinical bovine mastitis and should be used at the first signs of inflammation or at the first indication of any alteration in the milk.

Polymast Intrammamary Infusion for Lactating Dairy Cattle Provides control against the major mastitis causing pathogens – Streptococcus agalactiae, Streptococcus dysgalactiae, Staphylococcus aureus and Escherichia coli. Potent bactericidal action that does not rely on the cow’s immune system to kill bacteria.


Each 10 mL disposable syringe contains hetacillin potassium equivalent to 62.5 mg ampicillin activity

Dosage and Administration:

Consult your veterinarian

Safety Information:

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.

Storage: Do not store above 25° C (77° F)

Shipping: Ships ambient express.

Restrictions: Not available in: NE, MD, FL.

Cartons containing 12x10mL syringes with 12 convenient single use alcohol pads.


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