Xylitol and Dogs: Why It Is an Emergency

What to do right now

Grab the packaging and head for the phone. The vet will want to know the product name and flavor, how many pieces or how much is missing, when it happened, and your dog's weight. Xylitol content varies widely between products, and Pet Poison Helpline notes that it can differ even between flavors of the same gum, so the exact package matters more than a general guess.

Do not wait for signs and do not make your dog vomit at home unless a vet tells you to. Blood sugar can fall within 10 to 60 minutes of eating xylitol, according to the FDA, and a dog with low blood sugar can collapse on the way to the clinic. Your vet may ask you to come in immediately, so have your keys ready while you call, and drive straight to the nearest clinic that is open.

Why xylitol is so dangerous for dogs

Xylitol is a sugar alcohol, sometimes listed as birch sugar or wood sugar. In people it barely affects insulin, which is why it is popular in sugar-free foods. In dogs it is absorbed quickly and triggers a powerful release of insulin from the pancreas. That insulin pulls sugar out of the blood, causing a rapid and severe drop known as hypoglycemia.

Larger amounts can also damage the liver, and Pet Poison Helpline lists acute liver failure as one of the two main dangers. Liver injury may not show for a day or more, which is another reason a dog that seems normal after eating a pack of gum still needs to be checked and often monitored with repeat blood tests.

Where xylitol hides

The FDA lists sugar-free gum, breath mints, baked goods, cough syrup, chewable vitamins, mouthwash, toothpaste, some peanut and nut butters, over-the-counter medicines, supplements and sugar-free desserts, including low-calorie ice cream. Pet Poison Helpline adds puddings, gelatin snacks, syrups, jams, candies, nasal sprays, some fish oil supplements and some cosmetics.

The two that catch dog owners out most often are peanut butter and gum. Many people use peanut butter to hide pills or fill a chew toy, so check every jar's ingredient list for xylitol or birch sugar before it goes anywhere near your dog. Gum lives in handbags, coat pockets and car cup holders, all at dog height, and visitors may not know the risk. Never brush your dog's teeth with human toothpaste; use one made for dogs.

Signs of xylitol poisoning

Early signs are linked to low blood sugar: vomiting, then weakness, lethargy, staggering, poor coordination, trembling, collapse and seizures. The FDA notes these can begin within an hour, though some dogs do not show serious effects for 12 to 24 hours, especially with products that release xylitol slowly.

Signs of liver damage come later and can include vomiting, loss of appetite, yellowing of the gums or whites of the eyes, bruising or bleeding, and a dull, depressed dog. Any of these after a known or possible xylitol exposure means going to a vet straight away. Seizures or collapse at any point are an emergency.

How vets treat it

If your dog is seen quickly and has no signs yet, the vet may induce vomiting in the clinic. Because xylitol is absorbed so fast, the focus is usually on checking blood sugar repeatedly and giving sugar, often through an intravenous drip, to keep it stable for as long as the effect lasts. Many dogs are kept in hospital for monitoring for at least a day.

Liver values are checked over the following days, and dogs that develop liver injury need more intensive supportive care. The outlook is good for dogs treated promptly whose blood sugar is managed, and much more guarded once liver failure develops, which is why the advice is always to call before signs appear.

Preventing xylitol poisoning at home

Read labels on anything sugar-free, reduced sugar or "keto" before it goes in a low cupboard or a pet's bowl. Store gum, mints, vitamins and medicines in closed cabinets, and ask guests to keep bags zipped and off the floor. If you bake with sugar substitutes, keep the bag sealed and on a high shelf, and keep sugar-free baked goods well out of reach.

Cats appear far less affected, partly because they avoid sweet foods, but ferrets can develop the same low blood sugar and seizures, so households with other small pets should be just as careful. Save the poison control numbers in your phone today.

This page is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your pet.