Steroids & immune Dogs & Cats

Dexamethasone for dogs and cats

A strong steroid for inflammation, immune diseases and adrenal problems. Also used in a test for Cushing's. [1]

Last reviewed: October 2026 · 3 sources · see sources

Quick answerDexamethasone is a prescription medicine for dogs and cats. Much more potent than prednisone and longer acting. The most common side effects: more thirst, urination and appetite.

Key facts

Generic nameDexamethasone
Common brand namesAzium, Dexasone
Used inDogs & Cats
TypeSteroids & immune
Prescription?Prescription
Typical US priceNot listed (no reliable public source)

What it's used for

A strong steroid for inflammation, immune diseases and adrenal problems. Also used in a test for Cushing's. [1]

How it works

Much more potent than prednisone and longer acting. [1]

Side effects and cautions

Common side effects: More thirst, urination and appetite. Long-term: coat changes, weight gain and muscle weakness. [1]

Use with care: Not for pets with systemic fungal infections, diabetes or stomach ulcers. Don't combine with NSAIDs. [1] [2]

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 [3].

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.

Dexamethasone FAQ

What is Dexamethasone used for in dogs and cats?

A strong steroid for inflammation, immune diseases and adrenal problems. Also used in a test for Cushing's.

What are the side effects of Dexamethasone?

More thirst, urination and appetite. Long-term: coat changes, weight gain and muscle weakness.

Does Dexamethasone need a prescription?

Yes. It needs a prescription from a veterinarian.

How much Dexamethasone 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 (3) — tap to show
  1. VCA Animal Hospitals – Dexamethasone (veterinary drug handout)
  2. Merck Veterinary Manual – Corticosteroids in animals
  3. FDA – Frequently asked questions about animal drugs