Antibiotics Dogs & Cats

Marbofloxacin (Zeniquin) for dogs and cats

Treats bladder, kidney, prostate and skin infections. [1]

Last reviewed: October 2026 · 2 sources · see sources

Quick answerMarbofloxacin is a prescription medicine for dogs and cats. A fluoroquinolone antibiotic that stops bacteria from copying their DNA. The most common side effects: vomiting, diarrhea and low appetite.

Key facts

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

What it's used for

Treats bladder, kidney, prostate and skin infections. [1]

How it works

A fluoroquinolone antibiotic that stops bacteria from copying their DNA. [1]

Side effects and cautions

Common side effects: Vomiting, diarrhea and low appetite. Cartilage problems in young dogs. [1]

Use with care: Not for growing dogs (age limits depend on breed size). 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.

Marbofloxacin FAQ

What is Marbofloxacin used for in dogs and cats?

Treats bladder, kidney, prostate and skin infections.

What are the side effects of Marbofloxacin?

Vomiting, diarrhea and low appetite. Cartilage problems in young dogs.

Does Marbofloxacin need a prescription?

Yes. It needs a prescription from a veterinarian.

How much Marbofloxacin 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 – Marbofloxacin (veterinary drug handout)
  2. FDA – Frequently asked questions about animal drugs