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Polyflex Injection

Polyflex Injection
25gm/ 200ml - 25gm, 200ml IM Use Only
SKU : 3522_-RX
Price: $62.95
Price: $62.95

Veterinarian Prescription (RX) Required
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  • Antibacterial Injectable
  • Ampicillin 25gm, 200ml Vial
  • For IM use ONLY
  • A broad-spectrum penicillin, Polyflex (ampicillin trihydrate), is active against a wide range of common gram-positive and gram-negative bacteria
  • Available Size
    • 200 ml Vial
*Manufacturer restricts additional discounts on this item unless explicitly specified
How to Order Prescriptions


A broad-spectrum penicillin, Polyflex (ampicillin trihydrate), is active against a wide range of common gram-positive and gram-negative bacteria. It effectively treats respiratory tract infections, such as shipping fever in beef and dairy cattle and calves, including vealers. It has a six-day pre-slaughter withdrawal and a 48-hour milk withdrawal period after the last treatment. Polyflex also provides effective treatment for urinary tract, gastrointestinal, and skin (soft tissue) infections in cats and dogs.


The dosage of Polyflex will vary according to the animal being treated, the severity of the infection and the animal’s response.

Dogs and Cats

The recommended dose for dogs or cats is 3 mg/lb of body weight administered twice daily by subcutaneous or intramuscular injection.

Cattle and Calves Including Non-Ruminating (Veal Calves)

From 2 mg to 5 mg/lb of body weight once daily by intramuscular injection. Do not treat for more than 7 days.

In all species, 3 days treatment is usually adequate, but treatment should be continued for 48 to 72 hours after the animal has become afebrile or asymptomatic.

Directions for Use

The multi-dose dry-filled vials should be reconstituted to the desired concentration by adding the required amount of Sterile Water for Injection, USP, according to label directions. SHAKE WELL.

After reconstitution this product is stable for 3 months under refrigeration will be white to pale yellow in color. At the time of reconstitution the vial should be dated and the concentration noted on the label.


A history of allergic reactions to penicillin, cephalosporins or their analogues should be considered a contraindication for the use of this agent.

Residue Warnings

Do not treat cattle for more than 7 days. Milk from treated cows must not be used for food during treatment, and for 48 hours (4 milkings) after the last treatment. Cattle must not be slaughtered for food during treatment, and for 144 hours (6 days) after the last treatment.


Because it is a derivative of 6-aminopenicillanic acid, Polyflex has the potential for producing allergic reactions. If they should occur, Polyflex should be discontinued and the subject treated with the usual agents (antihistamines, pressor amines, corticosteroids).