Ampicillin (Generic) Capsules for Dogs, Cats & Horses, slide 1 of 1

Ampicillin (Generic) Capsules for Dogs, Cats & Horses 500-mg, 1 capsule

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Ampicillin is a broad-spectrum antibiotic prescribed to treat respiratory tract infections as well as skin and soft tissue infections. Some of these infections may include abscesses and wounds caused by certain types of bacteria. Customers may receive this drug under the names Princillin, Omni-Pen, Polyflex.

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Ampicillin capsules are indicated in the treatment of infections caused by susceptible strains of infections of the genitourinary tract including gonorrhea, infections of the respiratory tract, infections of the gastrointestinal tract.

Possible Side Effects

Side effects are more likely to occur in those who have previously demonstrated hypersensitivity to penicillins and in those with a history of allergy, asthma, hay fever, or urticaria.

Drug & Food Interactions

When administered concurrently, the following drugs may interact with ampicillin: allopurinol, bacteriostatic antibiotics, oral contraceptives and probenecid.


Prescribing Ampicillin capsules and Ampicillin for Oral Suspension in the absence of a proven or strongly suspected bacterial infection of a prophylactic indication is unlikely to provide benefit to the pet and increases the risk of the development of drug-resistant bacteria. Prolonged use of antibiotics may promote the overgrowth of nonsusceptible organisms, including fungi. Should superinfection occur, appropriate measures should be taken. Pets with gonorrhea who also have syphilis should be given additional appropriate parenteral penicillin treatment. Treatment with ampicillin does not preclude the need for surgical procedures, particularly in staphylococcal infections.

NOTE: For Generic Medications, picture displayed may not depict actual product. Generic medications may vary from one order to the next by size, color and shape depending on manufacturer. Please note product may arrive in a Chewy Pharmacy vial.

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  1. Prescribing Information

See all items by Ampicillin

  • Item Number
  • Generic Name
  • Common Brand Name(s)
    Princillin, Omni-Pen, Polyflex
  • For Use With
    Dogs, Cats & Horses
  • Administration Form
  • Product Form
  • Health Condition
    Wounds, Respiratory Infections, Urinary Tract Infections (UTI), Dental Infections
  • Drug Type


Recommended Dosage

The recommended dose is 3 mg per pound of body weight administered twice a day.

Storage Instructions

Store at room temperature in a tight, light-resistant, childproof container. Keep out of reach of children and pets.


What is Ampicillin and how does it work?

Ampicillin is a prescription penicillin-type antibiotic used to treat many different types of infections caused by bacteria, such as ear infections, bladder infections, pneumonia, gonorrhea, and E. coli or salmonella infection.

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