Pain Relievers for Dogs and Cats: NSAID Safety and What Pet Owners Should Know 💊🐾

By Dr Duncan Houston

Quick Answer

Never give human pain medications like ibuprofen, naproxen, or paracetamol to pets. Dogs and cats process these drugs differently, and even small amounts can cause serious toxicity. Only use pain relief prescribed by your veterinarian, especially NSAIDs designed specifically for animals.

When your pet is in pain, it’s natural to want to help immediately. But reaching for human painkillers can do far more harm than good.

As a veterinarian, I regularly see cases where well-meaning owners accidentally cause serious illness by giving the wrong medication. The key is knowing what is safe and what is not.

🧪 What Are NSAIDs?

NSAIDs are non-steroidal anti-inflammatory drugs used to reduce pain, inflammation, and swelling.

They work by blocking enzymes called cyclooxygenase (COX), which are involved in producing prostaglandins that cause pain and inflammation.

However, prostaglandins also play protective roles in the body, particularly in:

🩺 The stomach lining
💧 Kidney blood flow
🧬 Liver function

That is why NSAIDs must be used carefully, even when prescribed correctly.

⚠️ Why Human Painkillers Are Dangerous for Pets

Dogs and cats metabolise medications very differently from humans.

Giving human NSAIDs to pets can lead to:

😵 Toxic drug levels
🩸 Stomach ulcers or intestinal bleeding
🚱 Kidney failure
🧬 Liver damage
☠️ Life-threatening complications

Cats are especially sensitive and are unable to safely process many of these drugs.

🚫 The Most Dangerous Mistake: Paracetamol (Acetaminophen)

Paracetamol is extremely dangerous, particularly for cats.

🐱 Cats: Even a single tablet can cause fatal damage to red blood cells and oxygen transport
🐕 Dogs: High doses can cause severe liver failure

This is one of the most common and serious accidental poisonings seen in veterinary practice.

💊 Veterinary NSAIDs for Dogs and Cats

Veterinary NSAIDs are specifically designed and tested for use in animals.

Common options for dogs:

💊 Carprofen
💊 Firocoxib
💊 Deracoxib
💊 Grapiprant
💊 Meloxicam

Options for cats:

💊 Robenacoxib (short-term use)
💊 Meloxicam (typically single or carefully controlled dosing)

Cats have much stricter limitations, and long-term NSAID use is generally avoided or used very cautiously.

🧬 How NSAIDs Can Affect the Body

Even veterinary NSAIDs must be used carefully.

🍽️ Gastrointestinal system

NSAIDs can reduce protective mucus in the stomach, leading to:

⚠️ Ulcers
⚠️ Bleeding
⚠️ Vomiting or diarrhea

💧 Kidneys

NSAIDs affect blood flow to the kidneys.

This can be dangerous in pets that are:

🚱 Dehydrated
🧓 Older
🩺 Already dealing with kidney disease

🩸 Liver

Although uncommon, NSAIDs can cause liver damage.

This may be:

📉 Dose-related
⚠️ Idiosyncratic (unexpected reactions)

⚠️ Signs of NSAID Side Effects

If your pet is on NSAIDs, monitor closely.

Contact your vet if you notice:

🤢 Vomiting
💩 Diarrhea
🍽 Loss of appetite
😴 Lethargy
🩸 Black or bloody stool
🟡 Yellowing of gums or eyes

Most side effects occur early in treatment, so the first few weeks are especially important.

❗ Never Combine Medications Without Advice

Certain combinations are dangerous.

Never give:

🚫 Two NSAIDs together
🚫 An NSAID with steroids (such as prednisone)

These combinations dramatically increase the risk of stomach ulcers and complications.

🩺 Safe Use of NSAIDs

When prescribed correctly, NSAIDs can be very effective for:

🐾 Arthritis
🦴 Injury-related pain
🔧 Post-surgical pain

To use them safely:

✔️ Follow the exact dose and schedule
✔️ Give with food if recommended
✔️ Monitor for side effects
✔️ Do not adjust the dose without veterinary advice

🧪 Long-Term NSAID Use

Some dogs require long-term pain management, especially for arthritis.

In these cases, your vet may recommend:

🩸 Blood tests before starting
📊 Regular monitoring
📉 Using the lowest effective dose
🧠 Watching for subtle changes in behaviour or appetite

Regular check-ups help ensure ongoing safety.

📦 Medication Storage and Safety

Pets are surprisingly good at finding and eating medications.

To prevent accidental ingestion:

🔒 Store medications securely
🚫 Keep them out of reach
📦 Avoid leaving tablets in bags or containers pets can access

Accidental overdose is a common emergency.

🐾 Final Thoughts

Pain management is an important part of keeping pets comfortable and maintaining quality of life.

NSAIDs can be extremely helpful when used correctly, but they must always be used under veterinary guidance.

The most important rule:

❗ Never give human pain medication to your pet

If your pet is in pain, the safest and best approach is always to speak with your veterinarian and use medications specifically designed for animals.

❓ FAQ

Can I give my dog ibuprofen?

No. Ibuprofen is toxic to dogs and should never be given.

Is paracetamol safe for pets?

No. It is highly toxic to cats and dangerous for dogs at incorrect doses.

Are veterinary NSAIDs safe?

Yes, when prescribed and monitored by a veterinarian.

What should I do if my pet accidentally eats human medication?

Contact your veterinarian or an emergency clinic immediately.

If you want help tracking medications, monitoring side effects, or managing your pet’s pain safely, the ASK A VET™ app can help you stay organised and get veterinary guidance whenever you need it. 🐾📱