medication
Aspirin
IMMEDIATE VET ATTENTION
Aspirin is dangerous for dogs. It irritates the stomach and can cause bleeding ulcers and kidney damage.
If your dog has eaten this item, contact your vet or an emergency veterinary service now.
If your dog is showing symptoms such as difficulty breathing, seizures, collapse, severe vomiting, unconsciousness or other serious symptoms, seek emergency veterinary care immediately.
What to do
Contact your vet immediately. Do not give any further medication.
When to contact a vet: Emergency vet attention immediately, especially if vomiting blood, passing black stools, or very lethargic.
Symptoms to look for
- vomiting
- black tarry stools
- abdominal pain
- lethargy
- loss of appetite
- weakness
- rapid breathing
Why
Dogs metabolise aspirin slowly, so it stays in the body longer than in humans. It irritates the stomach lining and can cause ulcers and internal bleeding. It also affects blood clotting and can damage the kidneys, especially if a dog is dehydrated or has other health issues. Veterinary-formulated pain relief is very different from human aspirin and should never be substituted without guidance.
- Substances of concern
- acetylsalicylic acid
- Safer parts
- {}
- Parts to avoid
- {"any human aspirin tablet","buffered aspirin","enteric-coated aspirin"}
- Preparation
- No home preparation is safe.
- How much matters
- Toxicity varies by size and dose, but even one tablet can cause significant gastric irritation.
- Severity
- Severe
Sources
- ASPCA Animal Poison ControlPrimary authoritative — Medication
- Pet Poison HelplinePrimary authoritative — Medication
Information reviewed against recognised veterinary and animal-safety sources. Source organisations are independent of Is It For Dogs unless otherwise stated.
Last reviewed 6 September 2026 · next review due September 2027.
Safety classifications are based on available expert and veterinary information. Individual dogs may react differently, particularly dogs with allergies, existing health conditions or specific dietary requirements.
Important: Is It For Dogs provides general information about the safety of foods, plants, drinks, ingredients and other items around dogs. Our information is based on sources we consider reliable and is intended to help dog owners make informed decisions. It is not a substitute for advice from a qualified veterinary professional. Read more
Dogs can react differently depending on their size, age, health, allergies, medications, the amount consumed and other circumstances. An item classified as Safe is not necessarily suitable for every individual dog.
If your dog has eaten something potentially poisonous or dangerous, has eaten an unknown substance, or is showing concerning symptoms, contact your veterinarian or an emergency veterinary service immediately.
Do not induce vomiting or give your dog medication unless specifically instructed to do so by a veterinary professional.