Primor Tablets for Dogs, slide 1 of 1

Primor Tablets for Dogs

Prescription Item

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Strength: 1200-mg
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Count: 1 tablet

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Primor is a broad-spectrum antibiotic combination prescribed by vets to treat bacterial infections in dogs. It treats skin and soft-tissue infections, such as wounds and abscesses, and may also be effective against urinary tract infections caused by bacteria. It comes in a tablet, so you can feed it orally or slip it into a pill pocket to excite your furry friend.

Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.


Primor is for the treatment of skin and soft tissue infections (wounds and abscesses) in dogs caused by strains of Staphylococcus aureus and Escherichia coli and urinary tract infections.

Possible Side Effects

Primor should not be used in dogs showing marked liver parenchymal damage, blood dyscrasias, or in those with a history of sulfonamide hypersensitivity.

Drug & Food Interactions

Primor should not be used in dogs showing marked liver parenchymal damage, blood dyscrasias, or in those with a history of sulfonamide hypersensitivity.


Decreased water consumption and aciduria enhance the probability of the formation of sulfonamide crystals in the urine. Monitoring urine samples for crystal formation is recommended from animals with acid urine receiving the drug. As with any sulfonamide therapy, make certain dogs maintain adequate water intake. If dogs show no improvement within 2 or 3 days, reevaluate the diagnosis. Safety in breeding dogs has not been established.

Please note product may arrive in a Chewy Pharmacy vial, manufacturer packaging is shown for reference.

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  1. Prescribing Information

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  • Item Number
  • Common Brand Name(s)
  • For Use With
  • Generic Name
    Sulfadimethoxine, Ormetoprim
  • Administration Form
  • Product Form
  • Health Condition
    Skin Infections, Wounds, Urinary Tract Infections (UTI)
  • Drug Type

Sulfadimethoxine, Ormetoprim.

Recommended Dosage

Administer an initial oral dose of 25 mg/lb (55 mg/kg) of body weight on the first day of treatment. Administer subsequent daily doses at the rate of 12.5 mg/lb (27.5 mg/kg) of body weight. Continue treatment for at least 2 days after remission of clinical signs. Do not extend treatment for more than 21 consecutive days.

Storage Instructions

Store at controlled room temperatures 59° - 86°F.


What is Primor?

Primor is a broad spectrum antibiotic combination used to treat susceptible bacterial infections in dogs.

What are the benefits of Primor?

  • Treats skin and soft tissue infections such as wounds and abscesses.
  • Can also be effective against urinary tract infections caused by susceptible bacteria.
  • Effective against most skin infections.
  • A single, low dose provides rapid and sustained therapeutic blood levels.

How is this medication given?

Give Primor by mouth. It may be given with food. Leave plenty of water for your pet to drink.

How does this medication work?

Primor is made up of two antibiotics that limit bacterial growth, but also kill the bacteria as well.

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  • 5 out of 5 stars

    Miracle Drug!

    By Yukiko on Dec 14, 2019

    Our pbgv is cured thanks to Primor, a strong antibiotic, one of few recommended for E. coli. Our pet has been plagued with bladder stones and infection; she’s been on numerous medical diets and medications; had three surgeries, but the Primor has given her the cleanest, debris-free bladder and cured her of the E. coli. She is also on a Royal Canin hydrolized protein diet, a probiotic,and spring water, but all seem to be working to make her a healthy senior dog.

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