Why You Should Never Give Aspirin to a Dog

Quick Take

• Vets have quietly moved on from a drug your medicine cabinet still trusts. What replaced it?
• Some dogs face far higher stakes than others. Is yours one of them?
• Side effects and overdose look alike, but they aren't the same. Miss the difference and you could miss the emergency.
• Even the damage you can't see right away may be quietly building. Where does it strike?

Although aspirin knocks out your headache, it is not a good idea to give it to your dog. Dogs and humans have different biologies, and drugs that are safe for humans may be harmful to dogs. Veterinarians rarely prescribe aspirin for dogs because modern veterinary nonsteroidal anti-inflammatory drugs (NSAIDs) are much safer and more effective. Continue reading to learn more about why you should never give aspirin to a dog.

When Do Dogs Need Aspirin?

While aspirin was historically used for clot prevention in dogs, it is no longer considered the go-to treatment because modern veterinary medicine has safer, more effective alternatives like clopidogrel (Plavix®). For everyday pain, inflammation, or arthritis, a vet will almost always prescribe a modern veterinary-specific NSAID, such as carprofen, meloxicam, or deracoxib, because they are far gentler than aspirin on a dog’s digestive system and kidneys.

Side Effects

Giving a dog aspirin can cause a variety of concerning side effects, including stomach ulcers, gastrointestinal bleeding, vomiting, and kidney issues. Long-term use can accelerate the breakdown of joint cartilage. Because of these serious risks and the dangers of accidental overdose, you should never self-medicate your pet with human aspirin, baby aspirin, or any other over-the-counter pain relievers without direct instructions from a professional.

Signs Of Aspirin Overdose/Allergies In Dogs

It is important to know the difference between the side effects of aspirin and the signs of an aspirin overdose in your dog. If you’ve given your dog too much aspirin, you may see the following symptoms:

• Coma
• Hemorrhage: a ruptured blood vessel causing blood loss
• Diarrhea
• Vomiting
• Lack of appetite
• Seizure
• Death
• Lethargy

Watch for symptoms not only after giving aspirin but after giving any medication. Be attentive to how your dog reacts to any new medication. 

Aspirin Can Be Deadly

By now, it should be apparent that giving a dog aspirin is never a good idea. Although your veterinarian might occasionally administer aspirin, giving it to your dog in other situations could have deadly consequences. Aspirin should not be administered while your dog is on any other medication, and it should never be given to puppies or to pregnant or nursing dogs. Dogs on corticosteroids also should not be given aspirin. Never give aspirin to a dog with the following health conditions, as it could prove fatsl:

• Dogs with Von Willebrand’s disease, a disorder that prevents proper blood clotting
• Dogs recovering from an injury or surgery
• Dogs deficient in vitamin K
• Dogs with liver and kidney disease
• Dogs with an internal ulcer or bleeding complications

Aspirin is not recommended for dogs because its severe health risks far outweigh its benefits, especially since safer and more effective veterinary alternatives exist. Aspirin frequently causes devastating side effects in dogs, which is why modern veterinarians rely on targeted, species-safe alternatives.