🍬 My Dog Ate Xylitol or Sugar-Free Gum. Emergency?
Xylitol is the sugar substitute in most sugar-free gum, many mints and sweets, some peanut butters, protein bars, toothpastes and even children's medicines. In dogs it triggers a huge insulin release: blood sugar can crash within 30 minutes to an hour, and larger doses destroy the liver a day or two later. It is one of the few poisons where minutes matter, and one where the packet in your hand decides the plan.
Xylitol dose checker
Your dog's weight plus what went in gives the dose per kilo and the urgency. Estimating? Assume the worst case.
How much xylitol is toxic?
| Dose | Effect | For a 10 kg dog |
|---|---|---|
| 0.1 g/kg | Hypoglycaemia (insulin surge) within 10 to 60 minutes | 1 g: one to three pieces of gum, depending on brand |
| 0.5 g/kg | Acute liver failure over 1 to 3 days, sometimes with bleeding | 5 g: a pack of high-xylitol gum, a teaspoon of baking xylitol, a few spoons of xylitol peanut butter |
Xylitol content is rarely printed on the packet. Gum ranges from about 0.3 g to more than 1 g per piece; where xylitol is the first ingredient listed, assume the high end. Also found in: sugar-free mints and sweets, some peanut and nut butters, protein bars and powders, sugar-free baked goods and jams, chewable vitamins, children's liquid medicines, mouthwash and toothpaste, nasal sprays. Birch sugar is xylitol under another name.
Symptoms and timeline
| Time after eating | What you may see |
|---|---|
| 10 to 60 minutes | Vomiting, then signs of low blood sugar: weakness, wobbling, trembling, dullness, collapse, seizures. Gum and some products delay this by hours. |
| Up to 12 hours | Hypoglycaemia can still develop, which is why vets monitor glucose for 12 to 24 hours. |
| 24 to 72 hours | At higher doses: liver failure, with vomiting, jaundice, bleeding gums or bruises, and collapse. |
What the vet will do
Check blood glucose immediately, induce vomiting only if the dog is not yet hypoglycaemic and it was very recent (charcoal does not bind xylitol well), start dextrose in IV fluids for 12 to 24 hours, and check liver values at baseline and again over 72 hours. Liver protectants (SAMe, N-acetylcysteine) are common. Dogs treated before liver failure almost always recover.
What to do right now
- Grab the packet: product name and ingredient list.
- Go, or call while someone drives: Pet Poison Helpline (US/CA) 855-764-7661 · ASPCA Animal Poison Control 888-426-4435 · Animal PoisonLine (UK) 01202 509000 · Ireland and elsewhere: your vet or the nearest emergency clinic. Poison lines charge a fee; they are worth it.
- If your dog is already weak or wobbly and you cannot reach a vet within minutes, a smear of honey, syrup or glucose gel on the gums can hold blood sugar for a short while; then keep going.
- Do not induce vomiting in a dog that is already wobbly (aspiration risk).
Xylitol FAQ
How much xylitol will hurt a dog?
About 0.1 g per kg of body weight causes hypoglycaemia and 0.5 g/kg risks liver failure. For a 10 kg dog that is 1 g and 5 g: one to three pieces of gum, and a pack.
How many pieces of sugar-free gum are dangerous?
It depends on the brand: pieces range from 0.3 g to over 1 g of xylitol. Two pieces of a high-xylitol gum can push a 10 kg dog past the hypoglycaemia line; a toy breed can be in trouble from one. Assume the worst until a poison line confirms the product.
How quickly does xylitol affect dogs?
Blood sugar can crash within 10 to 60 minutes. Gum and some products delay absorption, so vets monitor for 12 hours even when the dog looks fine at first.
Is xylitol peanut butter dangerous to dogs?
Yes: a few spoons of a xylitol-sweetened peanut butter can be a liver-failure dose for a small dog. Check the label for xylitol or birch sugar before using peanut butter for pills or Kongs.
Can a dog survive eating xylitol?
Yes, most do when treated before liver failure: dextrose fluids for 12 to 24 hours and liver monitoring. Speed decides it. Dogs that reach the vet in liver failure have a much worse outlook.
Related
Sources: Pet Poison Helpline xylitol guidance (0.1 g/kg hypoglycaemia, 0.5 g/kg hepatic necrosis); Merck Veterinary Manual, Xylitol Toxicosis in Dogs; ASPCA Animal Poison Control Center; FDA consumer update on xylitol and dogs. Thresholds are population figures for otherwise healthy adult animals; puppies, kittens, seniors and animals with kidney, liver or heart disease can be affected at lower doses. Last reviewed August 2026.