My Dog Ate Aspirin: What to Do Now
Aspirin feels like the mildest pill in the cabinet, but it is toxic to dogs and even more so to cats. Why, what to do right now, the signs to watch for, and the products where it hides.
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Aspirin is toxic to dogs, and even more so to cats. If your dog swallowed any, call your vet or a poison line now, before any signs appear: ASPCA Animal Poison Control at (888) 426-4435 or Pet Poison Helpline at (855) 764-7661 (a fee may apply). VCA’s advice is to call as soon as you know, because early intervention is key, and Pet Poison Helpline says a toxic exposure needs aggressive veterinary treatment.
What to do right now
- Call, even if your dog seems fine. The ASPCA’s advice for any poisoning is not to wait for symptoms.
- Have the packet in hand. Say what the product is, how many tablets may be missing, and how much your dog weighs.
- Don’t induce vomiting or give anything by mouth unless the vet or the poison line tells you to; Pet Poison Helpline warns that home attempts can cause aspiration pneumonia and injure the esophagus or stomach.
- Go straight to a vet or emergency clinic if your dog is unconscious, has a seizure, struggles to breathe or is bleeding (ASPCA).
The free pet poison emergency card keeps these numbers and steps where you’ll find them fast.
Why aspirin is dangerous for dogs
Aspirin belongs to the salicylates. It blocks the enzymes that make prostaglandins and thromboxane, the Merck Veterinary Manual explains, and because platelets can’t make new enzyme, blood clotting is affected too. VCA puts it in plain words: aspirin blocks the processes that drive inflammation, but those same processes keep the stomach, intestines and kidneys working and the blood clotting normally.
Signs to watch for
VCA says signs may start within several hours and last a day or more. Tell your vet about any of these (Merck, VCA, Pet Poison Helpline):
- Stomach upset, which may include vomiting with blood, and a poor appetite.
- A raised body temperature.
- Unusually fast or deep breathing.
- Depression or lethargy.
- Seizures, coma or bleeding that is slow to stop (Merck); VCA adds that high exposures can damage the liver, kidneys and central nervous system, and Pet Poison Helpline lists kidney failure.
Where aspirin hides
Pet Poison Helpline lists hidden sources of aspirin-type drugs (salicylates): Pepto-Bismol, some topical medicines, sunscreens and makeup, pain-relief rubs, and oil of wintergreen. If your dog chewed a tube or licked a product like these, call the poison line and read the label out to them.
Cats are even more sensitive
Cats clear aspirin slowly because they lack much of the liver enzyme activity that breaks it down, Merck explains, and Pet Poison Helpline says they are much more sensitive than dogs. Never give a cat aspirin unless your vet prescribes it.
Never give a dog a human pain reliever on your own
The FDA’s rule covers every human medicine: don’t give it to your pet unless your vet tells you to. Keep medicines in a closed cabinet, track what your dog is actually prescribed with a dog medication log, and read the related answers on ibuprofen and naproxen and acetaminophen.
Frequently asked questions
- Can I give my dog aspirin for pain?
- Not unless your vet tells you to. The FDA's advice is not to give a pet any human medicine without your vet's direction, and Merck notes that long-term use can cause stomach ulcers in dogs. If your dog is in pain, call your vet; there are medicines made for dogs.
- Is baby aspirin safer for dogs?
- Don't treat it as safe. VCA says the risk depends on the type of product and how much was swallowed, and that existing health problems can raise it. That is for the poison line or your vet to work out, so call rather than guessing.
- How soon do signs of aspirin poisoning show?
- VCA says signs may start within several hours and last a day or more, which is why you call as soon as you know, not when your dog starts to look unwell.
- Is aspirin dangerous for cats?
- Yes, more so than for dogs. Cats clear aspirin slowly because they lack much of the liver enzyme activity that breaks it down (Merck), and Pet Poison Helpline says they are much more sensitive. Never give a cat aspirin unless your vet prescribes it.
Educational content only — not veterinary or professional behavior advice. Consult your vet, or a certified trainer or behaviorist, for your pet. Read the full disclaimer →