Dog ate xylitol — call your vet now
Xylitol is one of the most acutely toxic household ingredients for dogs. Even a single piece of sugar-free gum can drop a small dog's blood sugar to seizure levels in 30 minutes. This is a true emergency — call your vet while you read this.
ASPCA Animal Poison Control (US, 24/7): (888) 426-4435Signs to watch for
- Weakness, staggering, appearing "drunk" within 30–60 minutes
- Vomiting
- Collapse
- Tremors or seizures
- Yellow gums (jaundice) — sign of liver failure, 24–72 hours later
- Dark or black tarry stool — sign of internal bleeding
Timeline
Why xylitol is so dangerous
In humans, xylitol is a safe sugar substitute — we absorb it without spiking insulin. In dogs, the body treats xylitol as real sugar and releases a massive surge of insulin, which crashes blood glucose. Severe hypoglycaemia causes weakness, seizures, and death if untreated.
At higher doses, xylitol also triggers acute liver failure — a separate, delayed injury that can appear 24–72 hours after exposure. This is why a dog who "looked fine" in the clinic may still need 3 days of monitoring.
Xylitol is sold under several names: xylitol, birch sugar, birch xylitol, E967. It is increasingly common because it doesn't promote tooth decay and has fewer calories.
Where is xylitol hiding?
Check these products carefully — ingredient lists can change without warning:
- Sugar-free gum, mints, and breath strips (the most common poisoning)
- Some "natural" peanut butters — especially US brands marketed as healthy. US mainstream brands are mostly xylitol-free but always read the label
- Sugar-free baked goods, protein bars, and keto snacks
- Human toothpaste and mouthwash (taste-attractive to dogs)
- Some children's and adult medicines, vitamins, and chewable supplements
- Nasal sprays and throat sweets
How much is toxic?
Hypoglycaemia: 0.1g/kg bodyweight. A 5kg dog reaches this with just 0.5g of xylitol — less than half a stick of some sugar-free gums.
Liver failure: 0.5g/kg bodyweight. Larger doses, but easily reached with a few pieces of gum or a spoonful of xylitol-sweetened peanut butter.
Assume any product containing xylitol is dangerous and call your vet.
What to do right now
1. Call your vet or the ASPCA Animal Poison Control immediately. Have the packet, your dog's weight, and estimated amount eaten.
2. If your vet can't see you within 30 minutes, drive straight to an emergency clinic — xylitol acts fast.
3. On the way, keep your dog warm and awake. If collapse or seizure occurs, drive carefully — don't try home remedies.
4. The vet will induce vomiting (if within 1–2 hours), give IV dextrose, and monitor blood glucose and liver enzymes for 24–72 hours.
What not to do
- Don't try to feed honey or sugar at home unless a vet instructs it — absorption is too slow to rescue seizures.
- Don't "wait and see" — by the time seizures start, treatment is much harder.
- Don't assume your dog is safe if they seem normal in the first hour. Liver damage can appear 24–72 hours later.
Frequently asked
Is xylitol toxic to cats too?
Feline data is limited — cats appear less affected because their insulin response differs. But xylitol is not safe for cats either; treat any exposure as worthy of a vet call.
My dog ate one piece of gum but seems fine — do I need to go to the vet?
Yes. One piece of some brands contains enough xylitol to cause hypoglycaemia in a small dog. Seeming "fine" at 30 minutes means nothing — call your vet and let them assess the dose.
What peanut butters are safe?
Any peanut butter without xylitol in the ingredient list. US brands that contain xylitol do exist (mostly specialty / "healthy" lines) — always read the label, every purchase (formulas change).
How is xylitol poisoning treated?
Vets induce vomiting if recent (within 1–2 hours), give IV dextrose to restore blood sugar, and monitor liver enzymes for 24–72 hours. Most dogs caught early recover fully; delayed cases have worse outcomes.
Can I give my dog sugar instead of xylitol to fix low blood sugar?
Not without vet guidance. Sugar absorption is slower than IV dextrose and can delay appropriate treatment. If your dog is collapsing, get to a clinic.
Double-check another food, get a personalised follow-up, or talk to CRO about your pet’s specific situation.
This guide is educational and based on US veterinary sources (ASPCA APCC, AVMA, and peer-reviewed literature). It is not a substitute for a vet call. When in doubt, phone your vet or the ASPCA Animal Poison Control — the fee is far cheaper than a delayed case.