Polymast for Lactating Dairy Cattle

Polymast is an intramammary antibiotic used to treat acute, chronic, and subclinical mastitis in lactating dairy cows, effective against major gram-positive and gram-negative mastitis pathogens, with a milk withholding period of 72 hours after treatment.

PolyMast Hetacillin Potassium Intramammary Infusion is an antibiotic mastitis treatment for lactating dairy cows. Each 10 ml syringe contains hetacillin potassium equivalent to 62.5 mg ampicillin. Administer one syringe per affected quarter each 24 hours, for a maximum of 3 treatments. Milk withhold for 72 hours after last treatment. Each PolyMast syringe comes with a single use alcohol pad. Hetacillin potassium.

Original price was: $75.00.Current price is: $70.00.

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Description, Features & Compatibility

Buy Polymast for Lactating Dairy Cattle Online at Equines Vet Care

Polymast is a veterinary intramammary antibiotic infusion containing hetacillin potassium (equivalent to 62.5 mg ampicillin activity per 10 mL syringe). It is formulated for the treatment of clinical mastitis in lactating dairy cows caused by susceptible bacterial pathogens when used according to the manufacturer’s approved labeling and under the supervision of a licensed veterinarian.

At Equines Vet Care, we provide genuine veterinary medicines sourced from trusted manufacturers. We proudly support dairy farmers, veterinarians, milk producers, and livestock professionals with authentic animal healthcare products backed by secure online ordering, competitive pricing, dependable customer service, and reliable worldwide shipping.

What Is Polymast?

Polymast is a sterile intramammary infusion developed specifically for lactating dairy cattle. According to the manufacturer’s labeling, each disposable syringe contains hetacillin potassium, which provides 62.5 mg of ampicillin activity. The product is administered directly into the affected quarter after milking as directed by a veterinarian.

Polymast is indicated for the treatment of clinical mastitis caused by susceptible organisms including:

  • Streptococcus agalactiae
  • Streptococcus dysgalactiae
  • Staphylococcus aureus
  • Escherichia coli

Treatment decisions should always be based on veterinary diagnosis, herd health evaluation, and responsible antimicrobial stewardship.

Key Features

  • Contains hetacillin potassium (62.5 mg ampicillin activity per syringe)
  • Intramammary infusion for lactating dairy cows
  • Once-daily treatment protocol (up to three treatments as labeled)
  • Designed for clinical mastitis management
  • Convenient single-use sterile syringes
  • Prescription veterinary medicine
  • Manufactured to high veterinary quality standards
  • Secure online ordering
  • Competitive pricing
  • Fast USA and worldwide shipping

Why Buy from Equines Vet Care?

Equines Vet Care is committed to supplying genuine veterinary medicines while providing a professional and secure shopping experience.

Benefits include:

  • Genuine veterinary medicines
  • Secure online checkout
  • Competitive pricing
  • Fast order processing
  • Reliable worldwide shipping
  • Responsive customer support
  • Carefully packaged veterinary products
  • Trusted dairy herd healthcare brands

Veterinary Applications

Polymast is prescribed by veterinarians for the treatment of clinical mastitis in lactating dairy cattle caused by susceptible bacterial pathogens. According to the manufacturer’s directions, one syringe is infused into each affected quarter every 24 hours for up to three treatments. Proper milking hygiene, accurate diagnosis, culture and susceptibility testing where appropriate, and good herd management practices are important components of successful mastitis control.

Product Quality

Equines Vet Care sources veterinary medicines from reputable manufacturers committed to maintaining high standards of quality, consistency, and product integrity. Every order is carefully packaged to help preserve product quality during storage and transportation.

Convenient Online Ordering

Shopping with Equines Vet Care is simple, secure, and convenient. Browse our complete range of dairy cattle healthcare products, complete your purchase through our secure checkout system, and enjoy dependable shipping to eligible destinations throughout the United States and internationally.

Shipping Information

Equines Vet Care supplies veterinary medicines throughout the United States and many international destinations, including Canada, Australia, France, Germany, Spain, the Netherlands, Italy, Mexico, and many other eligible countries, subject to local veterinary medicine regulations, prescription requirements, and import laws.

Storage Recommendations

Store Polymast according to the manufacturer’s official instructions. Keep the syringes in their original packaging, protect them from excessive heat and direct sunlight, and follow all labeled storage recommendations to maintain product quality.

Important Veterinary Information

Polymast is for veterinary use only and is available by prescription in many countries. According to the approved labeling, milk from treated cows must not be used for food during treatment and for 72 hours (six milkings) after the final treatment, and treated animals must not be slaughtered for food until 10 days after the final treatment. Always follow the manufacturer’s approved labeling and the advice of a licensed veterinarian.

Why Choose Equines Vet Care?

Equines Vet Care is committed to providing trusted veterinary medicines, dependable customer support, and reliable worldwide delivery. Whether you operate a commercial dairy farm, veterinary clinic, or livestock enterprise, we strive to deliver genuine veterinary products supported by secure ordering, competitive pricing, and professional service.


Suggested H2 Headings

  • Buy Polymast for Lactating Dairy Cattle Online
  • What Is Polymast?
  • Key Features
  • Benefits of Shopping at Equines Vet Care
  • Veterinary Applications
  • Product Quality
  • Shipping Information
  • Storage Recommendations
  • Frequently Asked Questions

Frequently Asked Questions

What is Polymast?
Polymast is a prescription veterinary intramammary antibiotic infusion containing hetacillin potassium for the treatment of clinical mastitis in lactating dairy cows caused by susceptible bacteria.

What is the active ingredient?
The active ingredient is hetacillin potassium, equivalent to 62.5 mg ampicillin activity per 10 mL syringe.

Can I buy Polymast online?
Availability depends on your country’s veterinary medicine regulations and any applicable prescription requirements.

How is Polymast administered?
According to the approved labeling, one syringe is infused into each affected quarter every 24 hours for a maximum of three treatments, or as directed by a licensed veterinarian.

Should I consult a veterinarian before using Polymast?
Yes. Polymast should only be used under the supervision of a licensed veterinarian according to the manufacturer’s approved labeling.


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