Carprofen Overdose in Dogs: Signs and What to Do
Published 2026-07-01
A carprofen overdose is one of the more frightening scenarios an owner can face — a counter left unattended, a dropped tablet, a bottle a determined dog managed to open. Here's what overdose actually looks like, and exactly what to do if you suspect it.
How Overdose Usually Happens
Most carprofen overdoses aren't from a prescribed dose being wrong — they're from access accidents: a full or partial bottle chewed open, a second dose accidentally given by two people in the same household, or a dog getting into another pet's medication. Because carprofen tablets are flavored to be palatable, an accessible bottle is genuinely appealing to a dog, not just theoretically risky.
Signs of Carprofen Overdose in Dogs
- Vomiting, sometimes repeated
- Diarrhea, which may be bloody or black/tarry
- Lethargy or noticeable weakness
- Increased thirst and urination
- Loss of appetite
- In more severe cases, signs of kidney or liver injury, or neurological symptoms
Symptoms don't always appear immediately, and mild-looking symptoms don't rule out a more serious ongoing injury developing internally.
What to Do If You Suspect an Overdose
Don't wait to see if your dog "seems okay." Contact your vet, an emergency animal hospital, or an animal poison control hotline immediately. Have the following ready if you can: how many tablets/what strength was involved or unaccounted for, roughly when it happened, and your dog's current weight. This information meaningfully speeds up how quickly a vet can assess the situation and decide on treatment.
What Happens at the Vet
Depending on how recently the ingestion happened, treatment may include inducing vomiting, activated charcoal to limit further absorption, IV fluids to support kidney function, and bloodwork to monitor liver and kidney values over the following days. Dogs who receive prompt treatment generally have a much better outcome than those where treatment is delayed.
Preventing Accidental Overdose
Store carprofen in its original, child-and-pet-resistant container, out of reach, and let every member of the household know exactly who is responsible for giving doses to avoid an accidental double-dose. See our carprofen storage guide for more detail, and our dosage chart for context on what a normal dose looks like for your dog's weight, so you can better judge whether something seems off.
Frequently Asked Questions
How many carprofen tablets are dangerous for a dog?
It depends heavily on tablet strength and the dog's weight — there's no single universal number, which is why any suspected excess intake should be treated as a potential emergency and reported to your vet immediately.
Can a carprofen overdose be fatal?
Severe, untreated overdose can lead to serious kidney or liver injury and, in extreme cases, can be life-threatening — prompt veterinary treatment significantly improves outcomes.