Overview
Never give your dog paracetamol without advice from your vet. What helps us feel better can be dangerous for our pets. Paracetamol, a common human painkiller, can cause serious harm to dogs, even in small amounts. If your dog seems unwell or in pain, speak to your vet. They’ll assess your dog’s age, weight, and health history before recommending any treatment. Giving the wrong medication, or the wrong dose, can make things worse, especially if your dog has liver or kidney disease. Some symptoms may also be hiding bigger issues that need proper care.
Brief summary
Never give dogs human painkillers like paracetamol unless advised by a vet
Immediate vet advice and care is needed if a dog ingests human painkillers
Research shows high doses of paracetamol can harm dogs, causing liver, kidney, and blood issues
Always speak to your vet for dog-safe pain management
Has there been a rise in owners giving dogs paracetamol?
There's been a big increase in people searching online about giving dogs paracetamol, possibly to save on vet bills. However, this is risky as common human painkillers can be highly toxic to pets and can cause severe liver damage and red blood cell problems. Using home remedies might lead to higher vet bills or even the loss of your pet.
What is paracetamol, and how does it work?
Paracetamol is an over-the-counter medication found in nearly every household in the UK and is widely used for pain relief and fever reduction. Numerous human medications in different formulations contain paracetamol. Paracetamol is a highly effective pain reliever, particularly for the brain and spine, and is also safer for the stomach than some other painkillers. In addition, paracetamol does not interfere with blood clotting.
There is a veterinary formulation of paracetamol, which is licensed to be used in dogs as a pain reliever for certain conditions. Paracetamol should never be given to cats, as it is highly toxic to them.
What should you do if your dog swallows paracetamol?
Paracetamol poisoning in dogs is usually the result of the owner's at-home medication or accidental ingestion by the dog, particularly puppies. The toxic dose in dogs is around 50 to 100 mg per kg (check our article on dog weights to see how heavy your dog is likely to be).
If you're worried your dog has swallowed paracetamol, remove it from their surroundings, keep the packaging aside to show to your vet later, and contact your vet immediately. Even if your dog has only eaten a small amount, it is always best to contact your vet, who can advise you on whether the amount is likely to be problematic. This will vary between dogs, due to differences in weight, age and other factors.
What are the signs of paracetamol poisoning in dogs?
When humans take paracetamol, their liver breaks it down and removes it safely from the body. But, if dogs take too much paracetamol, it can affect their liver and blood cells. The symptoms of paracetamol poisoning can start showing up in dogs within two to 12 hours of ingestion.
In dogs, those symptoms may include:
Tiredness
Stomach pain
Vomiting blood
Black, tarry stools
Yellowing of the skin and eyes (jaundice)
Other possible symptoms can include:
Blue colouration of gums or skin (cyanosis)
Difficulty breathing
Fast heart rate
Swelling of the face, neck, chest, and limbs
Dark brown urine
What’s the treatment for paracetamol toxicity in dogs?
If it’s been less than an hour since your dog ingested paracetamol, your vet is likely to make them sick. They may also prescribe activated charcoal (5 ml/kg orally) to help remove toxins from their body. They may recommend medication to prevent vomiting and protect the stomach lining and intravenous fluid therapy. Your vet will likely do some blood tests to check how badly your dog has been affected. More severe cases may require specific medication to reduce the toxic effect of the paracetamol, blood transfusions, and oxygen therapy, depending on the severity.
What’s the prognosis for dogs poisoned by paracetamol?
If your dog swallows a dangerous amount of paracetamol, the chances of survival depend on how much they’ve ingested and how quickly they receive treatment. Dogs can be left with lasting organ damage from paracetamol ingestion. In severe cases, if your dog doesn't get veterinary help quickly, they can become unconscious and die within 1-2 days. If they survive the first three days, they're far more likely to recover.
Will my dog require overnight treatment and monitoring?
If your dog develops severe anaemia or liver damage due to paracetamol toxicity, it’s likely your vet will want to monitor them overnight. The vet will conduct blood tests to determine the extent of the anaemia and provide suitable treatment. To help your dog recover, it may be given fluids via a drip to flush out the paracetamol from its system, a blood transfusion if the anaemia is severe, and oxygen therapy if it has difficulty breathing.
How to prevent dogs from overdosing on paracetamol?
Keep all medicines in a safe place where pets can't access them. If your vet prescribes veterinary-formulated paracetamol, make sure you follow their instructions closely and give it exactly as directed.
My vet told me to give my dog paracetamol
Your vet might suggest paracetamol to help manage pain or reduce a fever, usually when other medicines aren’t suitable. This might be the case if your dog has a sensitive stomach or certain health issues. In the UK, there’s a licensed veterinary medicine called Pardale-V, which combines paracetamol with a small amount of codeine. But not all dogs can tolerate codeine, so vets sometimes prescribe paracetamol on its own, and only with clear, careful guidance.
If your vet has advised you to give your dog paracetamol, make sure you:
Give the correct dose at the recommended intervals
Watch for any signs of adverse reactions, such as vomiting, tiredness, or difficulty breathing
Keep all medicines out of reach of pets
If you notice any unusual symptoms or have concerns about the medication, contact your vet straight away
Do vets ever prescribe human medicines?
In the UK, vets do sometimes prescribe human medicines. This doesn’t mean giving your dog a painkiller from your medicine cabinet is safe. It means the vet has used their clinical judgement under a legal framework called the cascade.
The cascade allows vets to prescribe a medicine not licensed explicitly for a particular animal or condition only when no suitable veterinary medicine is available. It’s there to avoid unnecessary suffering while still keeping animals safe. When this happens, your vet will explain what the medicine is, why it’s been chosen, and how to give it safely.
For example, if your dog can't take Pardale-V, or if no suitable veterinary version is available, a vet may prescribe a human paracetamol product in a precise dose, for a specific reason, and with your consent.
Any studies on paracetamol in dogs?
One study into paracetamol toxicosis in dogs involved 17 healthy young dogs to examine how they reacted to different doses of paracetamol. The dogs were divided into groups — one with no treatment, one given a high but safe dose, and another given a toxic dose. Over 10 days, they found that even at high safe doses, paracetamol caused changes in the dogs' livers and kidneys and led to blood-related issues like anaemia. The dogs given toxic doses showed more severe changes. The study concluded that paracetamol should be used carefully and only for short periods in dogs, as it can be harmful even at doses usually considered safe.
Another paper entitled Acetaminophen Intoxication in a Dog highlighted the case of a five-year-old dog who got sick with vomiting and diarrhoea after visiting a park. Tests showed high levels of a substance in the blood that indicated liver and blood cell damage. The dog's health continued to decline. Despite treatment, the situation was too severe, and the dog was put to sleep. An examination after death confirmed serious damage to the liver and other organs due to paracetamol poisoning. The authors said the case shows how dangerous this painkiller can be for dogs, causing severe health issues and highlighting the importance of quick treatment in such cases.
Meanwhile, a 2023 study into perceptions and use of paracetamol in dogs among vets in the UK found that vets extensively use paracetamol, mainly for pain management. The prevailing view among vets is that paracetamol poses a low risk of side effects, which are generally mild if they occur. Over the last decade, perception has shifted, with many vets now regarding paracetamol as safer and more effective for reducing pain and fever reduction than previously believed.
Need more advice on the question of can you give dogs paracetamol?
If you need further advice about paracetamol, get in touch with your vet – they’ll always be happy to help. Remember, human medications like paracetamol can have serious, even life-threatening, effects on dogs, and only a vet can safely prescribe the correct medication and dosage.
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Medically reviewed by Lizzie Youens, BSc(Hons) BVSc MRCVS
Published on 08/01/2024 • Reviewed on 30/05/2025