PawAI LabPawAI LabTry it Free

My Dog Ate Naproxen: Immediate Steps to Take

PawAI Lab
7 min read

Take the right first steps after your dog ate naproxen (Aleve), including who to contact, what information to gather, and what to avoid doing at home while you wait for professional guidance.

Quick Answer

If your dog ate naproxen, treat it as an emergency and contact a veterinarian or animal poison-control service immediately, even if your dog appears fine. Naproxen is highly toxic to dogs even at small doses and can cause stomach ulcers, kidney failure, and neurological signs. Do not induce vomiting or give home remedies unless a professional directly instructs you to. Gather the packaging, your dog's weight, and an estimate of how much was ingested before you call.

Before using any tool, contact a veterinary professional if your dog may have swallowed naproxen.

  • US: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • UK: Animal PoisonLine (01202 509000) or your nearest veterinary emergency clinic
  • Canada: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • AU: Animal Emergency Centre or your regular vet
  • EU: Contact your nearest veterinary emergency service

TOXICITY CHECKER

Check the item and pet details for general, species-aware risk information while you contact a veterinary professional when needed.

Check an Item

Do not delay emergency veterinary or poison-control advice to use this tool.

Safety Verdict

Toxic. Naproxen (commonly sold as Aleve) is an NSAID that is not safe for dogs at over-the-counter doses. After ingestion, three main types of harm may develop: ulceration of the stomach and intestines, injury to the kidneys that can progress to failure, and neurological effects such as tremors or seizures. Because dogs eliminate naproxen slowly, exposure can be prolonged, and signs may not appear immediately, so prompt professional contact matters more than waiting to see how the dog looks.

What Should the Owner Do Now?

Act quickly but calmly. The first few minutes are best spent contacting a professional and gathering information rather than attempting home treatment.

  1. Contact a veterinarian or animal poison-control service immediately. Call even if only a small amount may have been eaten or if you are unsure of the exact quantity. Because naproxen is highly toxic to dogs at low doses, early guidance is especially important.
  2. Do not induce vomiting unless a veterinarian or poison-control professional directly instructs you to do so. With certain formulations, home induction can cause additional harm if used incorrectly.
  3. Do not give food, milk, antacids, or any medication as a home remedy. These are not proven treatments for naproxen toxicity and may complicate veterinary care.
  4. Do not give any other NSAID or pain medication to your dog while waiting for guidance, as combining NSAIDs sharply increases the risk of stomach ulcers and kidney harm.
  5. Collect the packaging for the product involved, including the strength, formulation (tablet, liquid gel, caplet, or enteric-coated), and whether it is a combination medicine.
  6. Estimate how much is missing and the time frame during which ingestion may have occurred.
  7. Note any current symptoms, even mild ones, such as drooling, vomiting, or reduced appetite.
  8. Follow the professional's instructions, which may include bringing your dog in immediately for examination and treatment.

If your regular veterinary clinic is closed, an emergency veterinary hospital or a poison-control hotline can still provide guidance.

What Signs May Occur?

Signs may develop within a few hours of ingestion, although kidney and neurological effects can take longer to appear. Because naproxen lingers in the body, signs may persist or worsen over a longer period than with some other medications. The absence of signs right now does not guarantee that harm is not developing.

Signs to watch for include:

  • Vomiting, especially with blood or a coffee-ground appearance
  • Black or tarry stools
  • Reduced appetite or refusal to eat
  • Drooling, nausea, or abdominal tenderness
  • Lethargy, weakness, or pale gums
  • Increased or decreased urination, which can signal kidney effects
  • Tremors, twitching, or seizures in more serious cases

If any of these signs are present, treat the situation as urgent and seek veterinary care without delay.

What Information Should Be Ready?

Having the following information ready before you call can help the veterinary team assess risk and recommend next steps more quickly:

  • Dog's details: species, breed, approximate age, and body weight
  • Product name and strength: brand, regular or higher-strength formulation
  • Formulation: whether the product is a tablet, liquid gel, caplet, or enteric-coated form
  • Other active ingredients: whether the product also contains antihistamines, decongestants, or other drugs
  • Estimated amount ingested: number of tablets, caplets, or milligrams missing
  • Time of ingestion: when exposure occurred or the window during which it may have happened
  • Current symptoms: any vomiting, stool changes, appetite changes, tremors, or behavior changes
  • Packaging: the bottle, box, or blister pack, if available
  • Medical history: existing kidney or liver disease, current medications (especially other NSAIDs or corticosteroids), or other conditions

Differences That May Affect Risk

The severity of risk after ingestion can depend on several factors that a veterinarian will consider:

  • Body weight: Smaller dogs are more vulnerable because the same number of milligrams represents a higher dose per kilogram.
  • Formulation: Liquid gels and enteric-coated forms may affect how quickly the drug is absorbed.
  • Combination ingredients: Additional active ingredients may cause separate toxic effects.
  • Concurrent medications: Other NSAIDs, corticosteroids, or blood thinners can substantially raise the risk of bleeding, ulcers, and kidney harm.
  • Age and health: Puppies, senior dogs, and those with kidney or gastrointestinal disease may be more vulnerable.
  • Species differences: Dogs eliminate naproxen much more slowly than humans, which is a major reason the drug is dangerous for them. Conclusions should never be transferred between species.

When to Contact a Veterinarian

Contact a veterinarian or animal poison-control service immediately if your dog has eaten naproxen. Do not wait for symptoms to appear.

Emergency signs that require urgent veterinary attention include:

  • Vomiting, especially with blood or coffee-ground appearance
  • Black or tarry stools
  • Pale gums, weakness, or collapse
  • Refusal to eat or abdominal pain
  • Tremors, twitching, or seizures
  • Noticeable increase or decrease in urine output
  • Rapid or labored breathing

Non-urgent follow-up: If you are unsure whether ingestion actually occurred, professional advice is still preferable to waiting and watching at home, because signs can be delayed and prolonged.

FAQ

What should I do immediately if my dog ate naproxen?

Contact a veterinarian or animal poison-control service immediately, even if your dog appears well. Do not induce vomiting or give home remedies unless a professional instructs you to. Gather the product packaging, your dog's weight, and an estimate of how much was ingested before you call.

Can I wait to see if my dog shows symptoms after eating naproxen?

No, waiting is not recommended. Naproxen is highly toxic to dogs even at small doses, and because dogs eliminate it slowly, harmful exposure can be prolonged. Signs may be delayed, so early veterinary contact generally improves outcomes.

Should I make my dog throw up if it ate naproxen?

Only if a veterinarian or poison-control professional directly instructs you to do so. Inducing vomiting at home can cause additional harm if used in the wrong situation or dose. A professional can advise whether decontamination is appropriate and how it should be performed.

TOXICITY CHECKER

Not sure whether another medication or household item may be risky for your dog? Get general, species-aware safety information in seconds.

Open Toxicity Checker

This tool provides general safety information only and does not replace veterinary advice.

Sources

Disclaimer

This article and the PawAI Toxicity Checker provide general safety information and cannot determine an individual pet's toxicity risk or replace a veterinarian or animal poison-control service. If exposure may have occurred, contact an appropriate professional promptly, even if your pet appears well.