Your dog ate sugar-free gum, mints, or another xylitol product. Is it dangerous? Enter the dog's weight, product type, and amount eaten to get an instant risk assessment based on veterinary toxicology thresholds from the ASPCA APCC and Merck Veterinary Manual.
If your dog is having seizures, collapsed, or unresponsive — go to an emergency vet immediately.
ASPCA Animal Poison Control: (888) 426-4435 · Pet Poison Helpline: (855) 764-7661 (fees may apply)
Xylitol acts FAST — symptoms can begin within 10 minutes.
Xylitol is 100x more toxic per kg than chocolate. A single piece of sugar-free gum can be dangerous for a small dog. If your dog ate any sugar-free product, act immediately.
Look for "xylitol", "birch sugar", or "E967" in the ingredients list.
If the whole pack/tube is missing, assume the worst — enter the full amount.
Xylitol is a sugar alcohol used as a sweetener in hundreds of "sugar-free" products. In humans, it has minimal effect on blood sugar. In dogs, xylitol is rapidly absorbed and triggers a massive insulin release from the pancreas — causing blood sugar to plummet to life-threatening levels within minutes. At higher doses (above 0.5 g/kg body weight), xylitol also causes acute hepatic necrosis (liver cell death), which can be fatal even after the hypoglycemia is treated.
| Product | Xylitol per unit | Danger level |
|---|---|---|
| Sugar-free mints | 0.03–0.1g | Moderate |
| Gummy vitamins | 0.1–0.5g | Moderate–High |
| Sugar-free gum | 0.3–1.0g | High |
| Sugar-free candy | 0.5–2.0g | High |
| SF peanut butter | ~1.0g/tbsp | Very high |
| Toothpaste | ~0.7–1.0g/g | Very high |
| Protein bars | 1–5g/bar | Extremely high |
| Pure xylitol | 1.0g/g | Most dangerous |
Xylitol content varies by brand. Source: ASPCA APCC; Murphy & Dunayer 2018; product label analysis.
Hypoglycemia risk
Insulin release within 10–60 min: vomiting, weakness, ataxia, seizures
Severe hypoglycemia
Collapse, seizures, loss of consciousness — can be fatal
Liver damage risk
Acute hepatic necrosis within 9–72 hours, even if hypoglycemia treated
Life-threatening
Fulminant liver failure, DIC, multi-organ failure, death
Sources: Dunayer 2004; Murphy & Dunayer 2018; ASPCA APCC; Merck Veterinary Manual.
It depends on the amount and your dog's weight, but yes — treat it as urgent. A single piece of xylitol-containing gum can cause dangerous hypoglycemia in a small dog (under 10 lbs). Xylitol triggers a massive insulin release in dogs, causing blood sugar to crash within 10–60 minutes. Always call your vet immediately after any suspected xylitol ingestion. Check the gum ingredients — look for 'xylitol', 'birch sugar', or 'E967'.
In humans, xylitol has minimal effect on blood sugar. In dogs, it's rapidly absorbed and triggers a powerful insulin release from the pancreas — up to 6x greater than the same dose of glucose. This causes severe hypoglycemia (dangerously low blood sugar) within 10–60 minutes, which can lead to seizures, collapse, and death. At doses above 0.5 g/kg body weight, xylitol also causes acute hepatic necrosis (liver cell death) within 9–72 hours, which can be fatal even if the initial hypoglycemia is treated.
Extremely fast. Vomiting can begin within 15–30 minutes. Hypoglycemia (low blood sugar) can develop in as little as 10 minutes and typically peaks within 30–60 minutes. Weakness, stumbling, and seizures follow. Liver damage, when it occurs, typically appears 9–72 hours after ingestion. This rapid onset is what makes xylitol so much more dangerous than chocolate — by the time you see symptoms, the toxin is already working.
Xylitol is found in hundreds of products. The most common sources dogs get into: sugar-free gum (most dangerous — high concentration), sugar-free mints and candy, some peanut butter brands (Nuts 'N More, P28, others), toothpaste, mouthwash, sugar-free baked goods, protein bars, gummy vitamins, nasal sprays, and pure xylitol sweetener used for baking. The word 'sugar-free' on any product should prompt you to check the label. Xylitol may also be listed as 'birch sugar', 'wood sugar', or 'E967'.
Yes — dramatically so. Xylitol is roughly 100 times more toxic per kilogram of body weight than milk chocolate. A 10 lb dog would need to eat about 3.5 oz of milk chocolate to show symptoms, but just 1–2 pieces of xylitol-containing gum could be life-threatening. Xylitol also acts much faster (minutes vs. hours for chocolate) and can cause liver failure in addition to the acute hypoglycemia.
If the dog is conscious and able to swallow, rub honey, corn syrup, or sugar water on their gums every 5 minutes. This provides a temporary glucose source to counteract hypoglycemia. Do NOT give food or liquid to an unconscious or seizing dog — there is a serious aspiration risk. Keep the dog warm and calm. Bring the product packaging so the vet can confirm xylitol content and calculate the dose. Call the vet or emergency clinic ahead so they can prepare.
Current evidence suggests xylitol does not cause the same insulin-mediated hypoglycemia in cats that it does in dogs. Cats appear to metabolise xylitol differently. However, large amounts could still cause GI upset, and the ASPCA recommends caution. If your cat ingests a xylitol product, monitor for vomiting and contact your vet for advice.