DogPoisonCheck

    Ibuprofen and Dogs

    Observe carefully — call your veterinarian if symptoms appear

    Quick answer

    Published references report vomiting from about 25 mg/kg, GI signs up to about 125 mg/kg, kidney injury risk from about 175 mg/kg and seizures above about 400 mg/kg; call your veterinarian after any ingestion.

    Published reference: Merck Veterinary Manual — human analgesic toxicoses; ASPCA APCC — Toxicology Brief: The 10 most common toxicoses in dogs (ibuprofen)

    Key facts

    Ibuprofen dose & risk calculator

    Educational estimate from published toxicology references. Not veterinary advice. If in doubt, call your vet.

    Risk level (example)

    Call your vet

    Estimated dose: 14.7 mg/kg

    Below the ~25 mg/kg level where vomiting is reported, but sensitive or older dogs can still be affected.

    • Call your vet for advice; stomach protection may be suggested.
    • Note the product, amount and time eaten; keep the packaging.
    • Do not induce vomiting unless a veterinarian tells you to.

    Emergency line

    ASPCA APCC (888) 426-4435, fee may apply · Pet Poison Helpline (855) 764-7661, fee may apply

    How thresholds are set: Published references (ASPCA APCC, Merck Veterinary Manual) report vomiting from about 25 mg/kg, GI signs up to about 125 mg/kg, kidney injury risk from about 175 mg/kg, seizures above about 400 mg/kg and potentially lethal effects above about 600 mg/kg. Repeated doses can cause harm at lower amounts.

    Source: Merck Veterinary Manual — human analgesic toxicoses; ASPCA APCC — Toxicology Brief: The 10 most common toxicoses in dogs (ibuprofen)

    Educational estimate from published toxicology references. Not veterinary advice. If in doubt, call your vet.

    Use the ibuprofen toxicity calculator

    Find a Local Vet ERCheck Toxicity For FreeDo NOT Induce Vomiting

    Did your dog eat something else too?

    Chocolate Grapes / Raisins Onions Xylitol Rat poison

    Sources reviewed 14 Oct 2026·Last updated · 3 min read

    Is ibuprofen toxic to dogs?Toxic dose by dog weightSymptoms timelineWhat to do right nowWhen to call a vetHow ibuprofen compares to other common toxins

    Ibuprofen is on our critical-substance reference list.

    If your dog has ingested any amount, contact your veterinarian. 24/7 animal poison-control hotlines (ASPCA Animal Poison Control Center, Pet Poison Helpline) are also available — fees may apply.

    Dose figures describe published observations, not a safe home-treatment threshold. Use the cited reference and contact a veterinarian for your dog's exposure.

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    Symptoms timeline

    1. 0-6 Hours
      • Vomiting (may contain blood)
      • Diarrhea
      • Nausea
      • Abdominal pain
      • Loss of appetite
    2. 6-24 Hours
      • Worsening GI signs
      • Lethargy / weakness
      • Black, tarry stools (melena) from stomach bleeding
      • Increased thirst
    3. 24+ Hours
      • Signs of acute kidney failure (changes in urination, severe lethargy)
      • Increased drinking and urination (or no urination)
      • Seizures
      • Coma
      • Death

    Is ibuprofen toxic to dogs?

    Yes, ibuprofen is extremely toxic to dogs and should never be given to them. This common over-the-counter pain reliever, also known by brand names like Advil, Motrin, and Nurofen, is a non-steroidal anti-inflammatory drug (NSAID) that can cause severe stomach and intestinal ulcers, and in higher doses, acute kidney failure and neurological problems.

    Dogs metabolize ibuprofen differently than humans. The drug blocks enzymes that protect the lining of the stomach and maintain blood flow to the kidneys. This sensitivity means that even a small amount can be dangerous, making it a critical and immediate concern if ingested.

    Toxic dose by dog weight

    Merck Veterinary Manual describes acute single-ingestion gastrointestinal effects at 100–125 mg/kg, renal failure at 175–300 mg/kg, and central nervous system signs above 400 mg/kg. Repeated doses as low as 8–16 mg/kg daily caused gastrointestinal injury in studies. These are different observations, not predictable mild/moderate/severe boundaries or permission to wait.

    Published dose reference: Merck Veterinary Manual — human analgesic toxicoses; ASPCA APCC — Toxicology Brief: The 10 most common toxicoses in dogs (ibuprofen); Pet Poison Helpline — Ibuprofen.

    Symptoms timeline

    Symptoms of ibuprofen poisoning in dogs typically begin with gastrointestinal upset and can progress to kidney or neurological damage within hours or days. The timeline and severity depend on the amount ingested and the individual dog.

    Early signs like vomiting and diarrhea can appear within 2 to 6 hours. More severe signs, such as black, tarry stools indicating stomach bleeding, can take 12 hours or longer to develop. Kidney failure may become apparent within 24 to 72 hours. An immediate veterinary consultation is critical, as waiting for symptoms to appear can make treatment less effective.

    What to do right now

    Dog poison control: phone numbers, fees and when to call. If you suspect your dog has eaten ibuprofen, you must take immediate action to ensure the best possible outcome. Do not wait for symptoms to develop, as internal damage may already be occurring.

    1. Secure the Medication: Remove your dog from the area and safely store any remaining pills to prevent further ingestion.
    2. Do NOT Induce Vomiting: Do not attempt to make your dog vomit unless specifically instructed by a veterinarian. Inducing vomiting can sometimes worsen damage to the esophagus and stomach, especially if ulcers are forming.
    3. Call for Professional Help: Immediately call your veterinarian, a local animal emergency clinic, or a pet poison control hotline. Have the ibuprofen bottle handy to provide the exact strength (e.g., 200 mg, 400 mg) and an estimate of how many pills were consumed.
    4. Contact Poison Control: The ASPCA Animal Poison Control Center (APCC) at (888) 426-4435 or the Pet Poison Helpline at (855) 764-7661 are available 24/7. A consultation fee may apply, but their expert advice is invaluable.

    When to call a vet

    You should call a veterinarian or poison control center immediately if you know or even suspect your dog has ingested any amount of ibuprofen. Because of the substance's high toxicity and rapid action, there is no "wait and see" period.

    • If you find chewed packaging for Advil, Motrin, or any ibuprofen product.
    • If you are missing pills and your dog was unsupervised.
    • If your dog exhibits any early signs of toxicity, such as vomiting, lethargy, or abdominal pain.
    • If you are uncertain about the dosage or whether the ingestion is dangerous.

    How ibuprofen compares to other common toxins

    Ibuprofen's toxicity profile is different from other common household substances, acting more rapidly and with a narrower margin of safety than many others. Unlike chocolate, where a small amount might not harm a large dog, any dose of ibuprofen is considered a potential risk.

    Compared to acetaminophen (Tylenol), which primarily targets the liver and red blood cells, ibuprofen attacks the gastrointestinal tract and kidneys. Compared to toxins like grapes or raisins, which cause kidney failure in some dogs through an unknown (idiosyncratic) mechanism, ibuprofen's toxicity is directly dose-dependent—the more ingested, the more severe the poisoning. All are dangerous, but the speed and type of organ damage differ significantly.

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    Frequently asked questions about ibuprofen and dogs

    How much ibuprofen is fatal to a dog?▾

    Merck Veterinary Manual describes acute single-ingestion gastrointestinal effects at 100–125 mg/kg, renal failure at 175–300 mg/kg, and central nervous system signs above 400 mg/kg. Repeated doses as low as 8–16 mg/kg daily caused gastrointestinal injury in studies. These are different observations, not predictable mild/moderate/severe boundaries or permission to wait.

    Published dose reference: Merck Veterinary Manual — human analgesic toxicoses; ASPCA APCC — Toxicology Brief: The 10 most common toxicoses in dogs (ibuprofen); Pet Poison Helpline — Ibuprofen.

    Can a dog survive eating one 200mg ibuprofen pill?▾

    It depends entirely on the dog's weight. A single 200mg pill is a toxic dose for any dog under 8.8 lbs (4 kg), which could cause severe gastrointestinal ulceration. For a medium or large dog, it may cause milder signs, but is still a risk. Always consult a vet regardless of the dog's size.

    What is the first sign of ibuprofen poisoning in dogs?▾

    The earliest and most common symptoms are gastrointestinal, such as vomiting (sometimes with blood), diarrhea, nausea, lack of appetite, and abdominal pain. These signs can appear within 2 to 6 hours of ingestion.

    Is there an antidote for ibuprofen poisoning in dogs?▾

    No specific antidote for ibuprofen exists. Veterinary treatment focuses on decontamination (like inducing vomiting or administering activated charcoal), protecting the kidneys with aggressive IV fluids, and using medications to treat or prevent stomach ulceration.

    What's the difference between ibuprofen and acetaminophen for dogs?▾

    Both are very dangerous for dogs, but they damage different organs. Ibuprofen (Advil/Motrin) is an NSAID that primarily causes stomach ulcers and kidney failure. Acetaminophen (Tylenol) is not an NSAID and primarily causes liver failure and damage to red blood cells (methemoglobinemia).

    Can I give my dog baby ibuprofen?▾

    No. You should never give a dog ibuprofen of any kind, including children's or infant's formulations. These products are still concentrated enough to be toxic to dogs, and accurate dosing is nearly impossible without veterinary guidance. There are safer, dog-specific pain medications available from your vet.

    References

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    This is educational information, not veterinary advice. Individual dogs react differently based on health history, medications, age, and other factors this tool cannot know. When in doubt, contact your nearest veterinarian or emergency animal hospital.