Never Give Your Dog Ibuprofen: Here Is Why

Half the dogs poisoned by ibuprofen were handed it by an owner trying to help. It is the kindest mistake in this whole guide, and one of the most damaging.

Your dog is limping. It is Sunday, the vet is shut, and there is a box of ibuprofen in the kitchen drawer. You know the dose for a child, so you work out something smaller.

Please do not. This is the single most common way dogs end up poisoned by painkillers, and the owners who do it are, without exception, trying to help.

Why a dog is not a small person

Ibuprofen belongs to a family called non-steroidal anti-inflammatories, along with naproxen and most of the other painkillers sold over a counter. Dogs are far more sensitive to them than we are.

In a dog these drugs attack the lining of the gut and the kidneys, and at higher doses they reach the liver and the nervous system too. The gap between an amount that sounds trivial and an amount that causes bleeding ulcers is much narrower than people expect, and it shifts with the dog's weight, age and whatever else it is taking. It is not a sum you can do at the kitchen table.

There is a simple rule that covers all of it. Never give your dog a human painkiller unless a vet has prescribed that exact product, at that exact dose, for that dog. If your dog is in enough pain that you are reaching for a box, that is the reason to ring the vet, not a substitute for it.

If your dog has already swallowed some

Whether it was a dropped tablet, a chewed blister pack or a dose you gave in good faith, the response is the same.

1. Ring your vet or a poison line straight away, even for a single tablet.
2. Have three things ready: what your dog weighs, the product name, and how much went in.
3. Keep the packet. Strengths vary and the box settles it.

In the UK, the Animal PoisonLine. In the US, the ASPCA Animal Poison Control Center or the Pet Poison Helpline.

If you gave the tablet yourself, say so plainly. Nobody is going to tell you off, and it is the fastest route to the right treatment.

Do not wait to see how it goes

This is the trap with NSAIDs. Damage to the stomach lining and the kidneys gets underway well before a dog looks unwell, so a bright, bouncing dog an hour later proves very little.

And do not try to make your dog sick unless a vet or a poison line has told you to.

What to watch for

• Vomiting, sometimes with blood in it
• Diarrhoea, or black, tarry stools
• A tender, painful belly
• Unusual tiredness and weakness
• Tremors, and in severe cases seizures
• Drinking or urinating noticeably more or less than usual

Black, tarry stools deserve a special mention. That colour is digested blood, and it means bleeding higher up the gut. It is always serious and always worth a phone call.

The bedside table problem

Painkillers travel better than almost anything else we own. They live in wash bags, handbags, glove boxes and hotel bedside drawers, and a blister pack dropped on an unfamiliar carpet is very easy to miss and very easy for a dog to find.

When you check into a room, have a quick look at dog height before you let your dog off the lead in it. It takes a moment, and medicines are the thing most worth finding.

The dose calculation is the whole conversation

When you ring, the three numbers are the tablet strength in milligrams, how many tablets, and your dog's weight.

That is genuinely all it takes for a poison line to tell you whether you are looking at a stomach-protection course or a hospital stay, and it is why the packet is worth finding before you phone rather than after.

What to give a dog in pain instead

Since the whole reason many of these cases happen is a dog in pain and a shut surgery, it is worth having the real answer.

Ring the out-of-hours service. Every practice has one, the call is usually free, and they will tell you whether your dog needs seeing tonight or whether it can wait until morning. Meanwhile, rest, a comfortable bed and restricted movement are safe and genuinely help most acute strains and sprains.

If your dog is on a prescribed veterinary anti-inflammatory already, never add a human one on top. Doubling up on NSAIDs from two directions causes exactly the damage described above.

Sources

This article was written using guidance from Animal PoisonLine (VPIS), the UK's only 24/7 poison advice line for pet owners, run by the Veterinary Poisons Information Service; RSPCA, the Royal Society for the Prevention of Cruelty to Animals, the UK's oldest animal welfare charity; and ASPCA Animal Poison Control Center, a leading 24/7 animal poison control resource in the United States. This guidance is for general information and does not replace a consultation with your own veterinarian. In an emergency, always contact a vet. Read [how we write our health guidance](https://rochsociety.com/how-we-write-our-health-guidance/). Last reviewed July 2026.