CAN DOGS EAT ASPIRIN?
Aspirin causes severe GI bleeding and kidney damage in dogs — it's one of the most dangerous over-the-counter pain relievers to leave within a dog's reach.
Can Dogs Eat Aspirin?
Why?
Aspirin (acetylsalicylic acid) is a salicylate NSAID that inhibits COX enzymes and platelet aggregation. Dogs metabolize aspirin more slowly than humans — the half-life in dogs is 7.5 hours compared to 6 hours in humans, causing greater accumulation. The prolonged exposure damages the gastric mucosa and reduces renal blood flow.
Aspirin causes irreversible platelet dysfunction, meaning blood cannot clot normally. Combined with gastric ulceration, this creates a high risk of serious internal bleeding. Enteric-coated aspirin is not safer — the coating delays absorption but the same total amount is absorbed.
While some older veterinary protocols used low-dose aspirin before safer alternatives existed, it is no longer recommended. Modern veterinary NSAIDs have dramatically better safety profiles. Aspirin use in dogs should only occur under direct veterinary supervision.
How much is dangerous?
GI irritation at any dose. Serious toxicity at approximately 25mg/kg. Severe symptoms at 50mg/kg. A single regular-strength tablet (325mg) is dangerous for dogs under 13kg (28 lbs).
What are the symptoms?
- vomiting (with or without blood)
- loss of appetite
- dark tarry stools
- abdominal pain
- lethargy
- rapid breathing (compensatory)
- kidney failure in severe cases
What should I do?
Contact your vet or ASPCA Poison Control (+1 888-426-4435). Induced vomiting if recent, then activated charcoal, IV fluids, and GI protectants. Hospitalization for monitoring.
Frequently asked questions.
Can I give my dog baby aspirin?
Only under veterinary direction, and only after confirming safer options don't exist. Never self-prescribe aspirin for your dog.
Is aspirin in a treat that fell on the floor dangerous?
Even a single tablet can cause significant GI irritation and bleeding risk. Call your vet.
Disclaimer: This information is for educational purposes only and does not constitute veterinary advice. Every dog is different. Always consult your veterinarian before making changes to your dog's diet or in the event of a potential poisoning emergency.