TL;DR: Xylitol is a highly toxic sweetener that causes life-threatening low blood sugar and liver failure in dogs. If your dog shows signs like tremors after consuming a sugar-free product, seek immediate emergency veterinary care.
What is xylitol poisoning and why is it dangerous for my dog?
Xylitol is a sugar alcohol found in many sugar-free products like gum, candy, and some peanut butters. While safe for humans, it is extremely toxic to dogs. When ingested, it causes a rapid, massive release of insulin, leading to a dangerous drop in blood sugar known as hypoglycemia. Tremors are a common neurological sign that your dog's blood sugar has reached critically low levels, or it may indicate the onset of acute liver failure.
What should I do if my dog is having tremors after eating xylitol?
- Recognize that tremors after xylitol ingestion indicate a life-threatening emergency requiring immediate action.
- Transport your dog to the nearest emergency veterinary clinic without delay.
- Do not wait for the tremors to stop or for additional symptoms, as this can lead to seizures, brain damage, or death.
- Understand that every minute counts in neutralizing the toxin and stabilizing your dog's glucose levels.
How can a photo of the product help the veterinarian treat my dog?
- Quickly snap a photo of the product packaging, specifically the ingredient list and the weight of the item, if it is safe to do so.
- Show this photo to the veterinary team upon arrival to help them calculate the exact dosage of xylitol consumed.
- Provide this vital information to help the vet determine the necessary intensity of treatment.
- Take a photo of any vomit to help the vet confirm if the toxic product was partially expelled.
Clinical Context (Merck Veterinary Manual)
In dogs, xylitol ingestion stimulates a rapid, dose-dependent insulin release, potentially causing profound hypoglycemia, with clinical signs such as vomiting, weakness, ataxia, depression, hypokalemia, seizures, and coma, possibly developing within 30 minutes or delayed up to 12-18 hours. Emesis should only be attempted under veterinary supervision in asymptomatic animals, as rapid onset of hypoglycemia is possible. Activated charcoal is not recommended, as it does not appreciably bind xylitol. If xylitol ingestion exceeds 75-100 mg/kg, hospitalization and baseline blood glucose measurement are indicated, with monitoring every 1-2 hours for at least 12 hours; if ingestion exceeds 500 mg/kg, baseline liver values should also be measured and evaluated every 24 hours for at least 72 hours. Hypoglycemia should be managed with IV dextrose boluses and/or constant-rate infusions, continued until the dog maintains normal blood glucose without supplementation. Dextrose should be administered even to normoglycemic dogs ingesting >500 mg/kg of xylitol, and hepatoprotectants like N-acetylcysteine, S-adenosylmethionine, and silymarin should be considered.
Chapter: Toxicology, Emergency, Internal Medicine
Source: The Merck Veterinary Manual, 11th Edition (Page 2969)