Quick Veterinary Answer: Yes, Xylitol (also labeled as birch sugar or wood sugar) is life-threateningly poisonous to dogs. In canines, xylitol causes a massive, rapid release of insulin that drops blood sugar to dangerously low levels within 15–30 minutes, leading to seizures and acute liver failure.
Key Toxicity Facts
| Target Animals: | Dogs |
| Toxic Principle: | Xylitol (sugar alcohol sweetener) |
| Dangerous Dosage: | 0.1 grams per kg body weight causes hypoglycemia; 0.5 grams per kg causes acute liver failure. |
| Clinical Severity: | Extremely Lethal / Hypoglycemia & Hepatic Necrosis |
Symptoms of Ingestion
- Vomiting and sudden weakness or stumbling within 15 to 30 minutes
- Severe lethargy, disorientation, and glassy eyes
- Muscle tremors, collapse, and full grand mal seizures
- Jaundice (yellow gums/eyes) and dark tarry stools from liver failure
Emergency First-Aid Protocol
- Check the ingredients on peanut butter, chewing gum, toothpaste, or baked goods for "xylitol" or "birch sugar".
- RUSH to the nearest veterinary hospital. Every 10 minutes counts.
- If your dog is unconscious or seizing, do NOT put anything in their mouth.
📞 24/7 Hotlines: ASPCA Animal Poison Control (888-426-4435) | Pet Poison Helpline (855-764-7661)
Frequently Asked Questions
What common products contain xylitol?
Sugar-free gums, certain brands of peanut butter, chewable vitamins, flavored waters, cough drops, and human toothpaste.