My dog ate Deramaxx—what should I do?

Updated 2026-09-30 · 1 sources

Based on: Pet Poison Helpline

Call a vet now

Call your vet or the nearest emergency vet right now. An overdose can result in stomach or intestinal ulcers and acute kidney failure.

What to do now

What to do right now

Call your vet or the nearest emergency vet
Note what, how much and when
Bring the packaging
Keep your dog calm and remove what is left

Don't

Do not make your dog vomit unless a vet tells you to
Do not give any human medicine

Why it can be dangerous

Deramaxx, also called deracoxib, is a veterinary-specific non-steroidal anti-inflammatory drug used in dogs for pain and inflammation associated with osteoarthritis.^[1] An overdose can result in stomach or intestinal ulcers and acute kidney failure.^[1]

Signs to watch for

Vomiting
Diarrhea
Kidney failure
Ulcers

If your pet is struggling to breathe, has collapsed, is having a seizure or can't stand up: go to the nearest vet now.

Not sure how serious it is?

OkPaw asks a few quick questions about your pet and tells you in 30 seconds whether it can wait. Free on Google Play for Android.

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Common questions

How much Deramaxx is dangerous?

An overdose can result in stomach or intestinal ulcers and acute kidney failure.^[1]

What signs should I watch for?

An overdose can result in stomach or intestinal ulcers and acute kidney failure.^[1]

What should I do now?

Call your vet or the nearest emergency vet, note what, how much and when, and bring the packaging.

Sources

Pet Poison Helpline

How this page was made: written with the help of AI from the sources below, then checked claim by claim against those sources. Urgency levels follow OkPaw’s fixed safety rules. It is guidance, not a diagnosis. How we write our pages