My dog ate ibuprofen (Advil): how much is toxic, and what to do
Ibuprofen (Advil, Motrin) — and its cousins naproxen (Aleve) and aspirin — are NSAIDs: they block the enzymes that protect the stomach lining and keep blood flowing to the kidneys. Dogs are far more sensitive than people, so a human dose can be a dog overdose. The damage comes in two waves: stomach ulcers first, kidney injury at bigger doses. How worried to be depends on milligrams per kilogram — and the calculator below does that math for you.
The 60-second version:
1. Count the milligrams: pills come in 200 mg (standard), 400 mg, and 600 mg. Naproxen (Aleve) is roughly twice as long-lasting and nastier.
2. Rough thresholds: stomach irritation from around 25 mg/kg, kidney risk climbing sharply above ~100 mg/kg, neurological signs (seizures, coma) above ~400 mg/kg.
3. Translation: one 200-mg tablet ≈ 44 mg/kg for a 10-lb dog — already into "call the vet" territory. One pill in a big dog is usually a stomach-ache; one pill in a small dog is a real event.
4. Kidney signs lag by 1–4 days. "Seemed fine yesterday" is not the all-clear.
Jump to
How much ibuprofen is toxic to a dog?
Veterinary references put the rough dose bands at:
| Ibuprofen dose | What to expect | Risk |
|---|---|---|
| Under ~25 mg/kg | Often mild stomach upset or nothing at all in a healthy adult dog. | Low |
| ~25–100 mg/kg | Vomiting, stomach pain, risk of GI ulceration and bleeding. | Moderate |
| ~100–400 mg/kg | Kidney injury joins the picture — hospitalization territory. | High |
| Above ~400 mg/kg | Seizures, coma, plus the above. Life-threatening. | Severe |
Caveats that move a dog up a band: puppies and seniors, dehydrated dogs, dogs with existing kidney disease, and dogs already on other NSAIDs or steroids. Naproxen (Aleve) lasts much longer in the body — treat it as a band more serious at the same milligram count.
Ibuprofen / NSAID risk calculator
Enter your dog's weight, the medication and strength, and how many pills were eaten:
Prefer the full-page version? Open the Ibuprofen & NSAID Toxicity Calculator →
What that means in real pills
| Dog size | One 200 mg tablet | Verdict |
|---|---|---|
| 10 lb (4.5 kg) | ≈ 44 mg/kg | Call the vet — ulcer range |
| 25 lb (11 kg) | ≈ 18 mg/kg | Usually mild — still call if any signs |
| 50 lb (23 kg) | ≈ 9 mg/kg | Low — watch for stomach upset |
| 10 lb, THREE tablets | ≈ 133 mg/kg | Emergency — kidney range |
The pattern to memorize: small dog + more than one pill = phone call, every time. Dogs don't nibble tablets and stop; they eat the bottle. The sugar coating on many brands makes it worse.
Symptoms of ibuprofen poisoning — and the timeline
- First 2–12 hours (stomach wave): vomiting (sometimes with blood), drooling, loss of appetite, belly pain, diarrhea — later, black tarry stools from GI bleeding
- Days 1–4 (kidney wave): drinking and urinating much more or noticeably less, lethargy, worsening vomiting, dehydration
- Massive doses: wobbliness, tremors, seizures, coma
The kidney wave is the one that empties wallets and breaks hearts, and it arrives quietly. That's why vets push fluids before it starts in significant ingestions.
What to do if your dog ate ibuprofen
- Do the pill math: brand, strength (it's on the bottle: 200/400/600 mg), how many are missing, and when.
- Run the calculator for the mg/kg and risk band.
- Call now: your vet, ASPCA Animal Poison Control (888) 426-4435, or Pet Poison Helpline (855) 764-7661. Over ~25 mg/kg, they'll likely want the dog seen.
- Don't give anything at home — no hydrogen peroxide, no Pepto, no more meds — unless a professional tells you to.
- Bring the bottle to the vet. Find the nearest open emergency vet →
What the vet will do
For a recent ingestion, the vet induces vomiting and gives activated charcoal — sometimes repeated, because ibuprofen recirculates through the gut. Stomach protection follows: antacids (a PPI), a coating agent, and sometimes misoprostol. For doses in the kidney range, the standard is 48 hours of IV fluids to keep the kidneys flushed, with blood tests at intake and again at 48–72 hours. Dogs whose kidneys are protected early almost always come through fine; dogs who arrive after two days of vomiting are the hard cases.
What treatment costs — and the insurance question
Realistic ballparks: decontamination (vomiting + charcoal + exam) runs roughly $200–$600; ulcer treatment with outpatient medications adds $100–$300; the 48-hour fluid hospitalization with kidney monitoring runs roughly $1,500–$3,000; a dog in established kidney failure needing days of intensive care can exceed $5,000. Toxin ingestions are exactly what accident-and-illness pet insurance covers — typically up to 90% after the deductible. Compare plans before you need one, not after.
Frequently asked questions
My dog ate one 200 mg Advil — is that dangerous?
For a medium or large dog, usually not beyond a possible stomach ache — but call if you see vomiting or appetite loss. For a small dog (under ~15 lb), one tablet lands in the ulcer range and is worth a call to the vet or poison line. The calculator above gives the exact band for your dog's weight.
How long does ibuprofen poisoning take to show in dogs?
Stomach signs usually start within 2–12 hours. Kidney injury is delayed — typically 1 to 4 days — which is why treatment before symptoms is so much more effective than treatment after.
Is Aleve (naproxen) worse than Advil?
Yes. Naproxen does the same damage but lasts far longer in a dog's body, so a single pill keeps injuring the stomach and kidneys for days. Treat any naproxen ingestion as urgent.
Can I give my dog ibuprofen for pain?
No — not without a veterinarian explicitly prescribing a dose, and vets virtually never do, because safe veterinary NSAIDs (like carprofen) exist. The margin between "helps" and "ulcers" in dogs is too thin to improvise.
Can dogs die from eating ibuprofen?
Yes — from GI perforation, kidney failure, or seizures at massive doses. Deaths are uncommon when treatment starts early, which is why the first phone call matters more than any home remedy.
What about cats?
Cats are even more sensitive to NSAIDs than dogs — and their nightmare medication is a different one: acetaminophen (Tylenol), where a single tablet can be fatal to a cat. Keep the whole medicine cabinet closed.
Sources: ASPCA Animal Poison Control Center; Merck Veterinary Manual (NSAID/ibuprofen toxicosis); Pet Poison Helpline. Cost figures are general U.S. estimates and vary by clinic and region. This guide is general information, not a substitute for veterinary advice — when in doubt, call a professional.