Suspect poisoning? US: ASPCA Poison Control (888) 426-4435 · UK: 01202 509 000 · Severe symptoms → nearest emergency vet now.

What is the nicotine toxicity calculator for a dog that ate a used nicotine patch?

Dogs · Toxicity calculator
Short answer

Call your vet or the ASPCA Poison Control line (888-426-4435 in the US) immediately—nicotine acts fast in dogs. A used patch still contains enough nicotine to cause vomiting, tremors, seizures, abnormal heart rate, and even death, especially if ingested within the first hour. Bring the product and any remaining patches so the vet can read the nicotine strength from the label. Do not wait for symptoms to appear, and watch your dog closely for at least 4 hours.

Why is nicotine so dangerous for pets?

Nicotine is a fast-acting stimulant toxin: it over-excites nerves, then blocks them, causing tremors, seizures and heart rhythm problems. Poisoning can begin within 15–60 minutes, so speed matters.

About the dose levels
Symptoms are possible above roughly 1 mg/kg; severe poisoning above 4–5 mg/kg. These bands are a guide — nicotine products vary a lot in concentration.

Signs to watch for

  • Excitement, drooling, vomiting and diarrhoea (first 15–60 min)
  • Rapid heart rate, then slowed heart rate
  • Tremors, twitching, seizures
  • Wobbliness, collapse, shallow breathing
  • Death in severe untreated cases

What to do right now

  1. Call your vet immediately — nicotine acts fast.
  2. Bring the product so the vet can read the nicotine strength on the label.
  3. Do not wait for symptoms; vomiting can be induced if the vet says it is safe and ingestion was recent.
  4. Watch the pet for at least 4 hours even if it looks fine at first.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.

Open the full calculator: Nicotine Toxicity Calculator →