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  • Helps prevent pushing harmful surface bacteria into the teat canal
  • Provides the convenience of full or partial insertion
  • Partial insertion of mastitis tubes is proven to reduce new mastitis infections by up to 50 percent1

Product Description

An antibiotic mastitis treatment providing bactericidal activity against Gram-­positive and Gram-­negative bacteria.

  • Each 10mL disposable syringe contains hetacillin potassium equivalent to 62.5mg ampicillin activity
  • Convenient once‐per-­day dosing 
  • Provides control against the major mastitis causing pathogens – Streptococcus agalactiaeStreptococcus dysgalactiaeStaphylococcus aureus and Escherichia coli
  • Potent bactericidal action that does not rely on the cow’s immune system to kill bacteria
  • Federal law restricts this drug to use by or on the order of a licensed veterinarian.


  • Pail containing 144x10mL syringes and 144 convenient single use alcohol pads.
  • Cartons containing 12x10mL syringes with 12 convenient single use alcohol pads.

Features & Benefits

  • Milk withhold just 72 hours after last treatment
  • PolyMast reduces antibiotic use when you switch from extended therapy
  • Effective against a wide range of common bacteria
  • Is a broad-­spectrum treatment for subclinical and clinical mastitis
  • OPTI-­SERT tip reduces the risk of new infections1

Dosage Information

One syringe per affected quarter each 24 hours for a maximum of 3 treatments. See package insert for additional information.

Product Resources

Contact Information

  • Boehringer Ingelheim Animal Health USA Inc.

    Cattle Division

    3239 Satellite Blvd NW,
    Duluth, GA 64506

    • Phone 866-638-2226
    • Fax 816-326-9167
    • e-mail

A peer-­reviewed, head­‐to­‐head trial compared hetacillin potassium (the active ingredient in POLYMAST) and ceftiofur hydrochloride (SPECTRAMAST LC).

The trial concluded that the two treatments had no significant difference in overall clinical and bacteriological cure rates.2

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 last treatment.

PRECAUTION:Because it is a derivative of 6-aminopenicillanic acid, PolyMast has the potential for producing allergic reactions. Such reactions are rare; however, should they occur, treatment should be discontinued and the subject treated with antihistamines, pressor amines, such as epinephrine or corticosteroids. The drug does not resist destruction by penicillinase and, hence, is not effective against strains of staphylococcus resistant to penicillin G.

Caution: Federal law restricts this drug to use by or on the order of a licensed veterinarian.

1. Boddie RL, Nickerson SC and Sutherland SF.  New design of mastitis tubes reduces infections. Hoard’s, 1989;134(13):579.

2. Vasquez AK, Nydam DV, Capel MB, etal.  Randomized non-inferiority trial comparing two commercial intramammary antibiotics for the treatment of non-severe clinical mastitis in dairy cows.  J Dairy Sci 2016 in press.

POLYMAST® is a registered trademark of Boehringer Ingelheim Vetmedica GmBH, used under license. All other trademarks are the property of their respective owners. ©2019 Boehringer Ingelheim Animal Health USA Inc. Duluth, GA. All Rights Reserved. BOV-2227-MAST0619.