Antibiotics Dogs & Cats

Enrofloxacin (Baytril) for dogs and cats

A fluoroquinolone antibiotic used for a wide range of bacterial infections. [1]

Last reviewed: October 2026 · 2 sources · see sources

Quick answerEnrofloxacin is a prescription medicine for dogs and cats. It blocks the enzymes bacteria need to copy their DNA. The most common side effects: vomiting, diarrhea and low appetite.

Key facts

Generic nameEnrofloxacin
Common brand namesBaytril
Used inDogs & Cats
TypeAntibiotics
Prescription?Prescription
Typical US priceNot listed (no reliable public source)

What it's used for

A fluoroquinolone antibiotic used for a wide range of bacterial infections. [1]

How it works

It blocks the enzymes bacteria need to copy their DNA. [1]

Side effects and cautions

Common side effects: Vomiting, diarrhea and low appetite. Rarely seizures, wobbliness or joint cartilage problems in young animals. [1]

Use with care: Not for growing puppies. In cats, high doses have been linked to blindness, so follow the dose exactly. Use caution in pets with seizures. [1]

Call your vet right away if your pet has trouble breathing, facial swelling, hives, collapse, or any side effect that is severe or getting worse.

About dosingDosing is your vet's call. We don't list doses because the right amount depends on your pet's weight, age, health and other medicines. Don't change a dose or stop a medicine without asking your vet, and never give a pet medicine meant for people unless your vet tells you to [2].

What it costs

We don't list a price for this one because we couldn't find a reliable public source. Ask your vet or pharmacy for a quote; prices depend on your pet's size, the dose and where you fill it.

Enrofloxacin FAQ

What is Enrofloxacin used for in dogs and cats?

A fluoroquinolone antibiotic used for a wide range of bacterial infections.

What are the side effects of Enrofloxacin?

Vomiting, diarrhea and low appetite. Rarely seizures, wobbliness or joint cartilage problems in young animals.

Does Enrofloxacin need a prescription?

Yes. It needs a prescription from a veterinarian.

How much Enrofloxacin should I give my pet?

Only your veterinarian can tell you. The right dose depends on your pet's weight, health and other medicines, so we don't list doses. Never give a pet a medicine prescribed for a person or another animal without asking your vet.

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This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.

Sources (2) — tap to show
  1. VCA Animal Hospitals – Enrofloxacin (veterinary drug handout)
  2. FDA – Frequently asked questions about animal drugs