How quickly do clinical signs appear after xylitol ingestion in dogs?

Clinical signs of hypoglycemia typically appear within 30 minutes to 12 hours after ingestion. Hepatic necrosis signs may be delayed 9–72 hours post-ingestion.

What product types contain the most xylitol?

Sugar-free gum typically contains the highest concentration of xylitol (~1 g per piece). Peanut butter, baked goods, toothpaste, and sugar-free candies also contain xylitol in varying amounts. Always check product labels.

Is there an antidote for xylitol toxicity?

There is no specific antidote for xylitol toxicity. Treatment is supportive, including decontamination, glucose monitoring and supplementation, hepatoprotectants, and IV fluid therapy.

Clinical decision support

Xylitol toxicity calculator

Estimate xylitol dose and toxicity risk for dogs based on product type and amount ingested.

Reference ranges & assumptions

Gum (g xylitol / piece) Peanut butter (g xylitol / serving)

Baked goods (g xylitol / oz) Toothpaste (g xylitol / oz)

Sugar-free candy (g xylitol / piece)

Hypoglycemia threshold (g/kg) Hepatic necrosis threshold (g/kg)

Threshold defaults align with Merck/MSD Veterinary Manual guidance: hypoglycemia risk near 0.1 g/kg and hepatic injury risk near 0.5 g/kg. Product concentrations are estimates; adjust to the specific label.

Xylitol dose

— mg/kg

Enter values

Enter weight and xylitol amount to calculate.

Risk level —

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Hypoglycemia risk —

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Hepatic risk —

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Clinical next steps

Contact a veterinarian or poison-control service immediately with product label, time since exposure, and calculated dose.
Veterinary-supervised emesis may be considered only when exposure is recent and the dog remains clinically normal.
Activated charcoal does not appreciably bind xylitol and is not recommended for xylitol itself.
For doses >0.1 g/kg, monitor blood glucose every 1–2 hours for at least 12 hours; treat hypoglycemia with IV dextrose as needed.
For doses >0.5 g/kg, check baseline liver enzymes/coagulation and monitor liver values at least every 24 hours for 72 hours.
Consider hepatoprotectants such as N-acetylcysteine, SAMe, or silymarin for hepatic risk patients under veterinary direction.
Provide IV fluid therapy and supportive care; prognosis is good with early intervention for hypoglycemia, guarded for hepatic necrosis.

Safety checks

This tool supports calculation and education only.
It does not diagnose, prescribe, or replace current clinical references.
Verify patient-specific decisions with current toxicology references, hospital protocols, and veterinarian judgment.
Xylitol concentrations vary widely by brand and product. Use custom input when unsure.
Confirm weight and amount units before calculating.

Basis and limits

Calculation basis: total xylitol (g) = amount × g per unit (from assumptions). Dose (mg/kg) = (total g × 1000) / body weight (kg).
Assumed concentrations: defaults are estimates and vary by brand. Adjust in the Assumptions panel to match the specific product.
Grams input: the grams option means grams of xylitol. If only total product weight is known, convert from the label concentration first.
Toxicity thresholds: hypoglycemia risk >0.1 g/kg; hepatic necrosis risk >0.5 g/kg. Adjustable in assumptions.
Scope: this tool estimates exposure. It does not replace toxicology consultation or clinical judgment.

Formula audit trail

1. Convert amount to grams of xylitol using product-specific concentration from assumptions.

2. Total xylitol (mg) = grams × 1000.

3. Dose (mg/kg) = total mg / body weight (kg).

4. Risk level is categorized against the editable thresholds in the Assumptions panel.

Calculation steps will appear here for verification.

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Last reviewed: May 2026

Sources: Merck/MSD Veterinary Manual; ASPCA Animal Poison Control Center

Xylitol toxicity calculator

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