Seizures Dogs

Potassium bromide for dogs

Treats seizures in dogs, alone or with phenobarbital. [1]

Last reviewed: October 2026 · 2 sources · see sources

Quick answerPotassium bromide is a prescription medicine for dogs. Bromide makes brain cells less excitable. The most common side effects: sedation, more thirst, urination and appetite, vomiting and wobbliness.

Key facts

Generic namePotassium bromide
Common brand namesK-BroVet, Libromide
Used inDogs
TypeSeizures
Prescription?Prescription
Typical US priceNot listed (no reliable public source)

What it's used for

Treats seizures in dogs, alone or with phenobarbital. [1]

How it works

Bromide makes brain cells less excitable. [1]

Side effects and cautions

Common side effects: Sedation, more thirst, urination and appetite, vomiting and wobbliness. [1]

Use with care: Used with extreme caution in cats because it can cause serious side effects. Avoid salty foods and salt water, which change how it works. [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.

Potassium bromide FAQ

What is Potassium bromide used for in dogs?

Treats seizures in dogs, alone or with phenobarbital.

What are the side effects of Potassium bromide?

Sedation, more thirst, urination and appetite, vomiting and wobbliness.

Does Potassium bromide need a prescription?

Yes. It needs a prescription from a veterinarian.

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