Is White Snakeroot poisonous to dogs and cats?

Updated 2026-09-30 · 1 sources

Based on: Cornell University Dept. of Animal Science - Plants Poisonous to Livestock and other Animals

Call a vet today

White Snakeroot is poisonous to dogs – call your vet today for advice if your pet has eaten any of it. Our sources do not list it for cats, which is not proof that it is safe for them. All parts of the plant are poisonous, and its toxic principle is tremetone.

  • Dogs Call a vet today
  • Cats Not listed in our sources – that is not proof that it is safe

What to do right now

  1. Call your vet or the nearest emergency vet today.
  2. Note which plant, which part, how much and when.
  3. Take a photo or a piece of the plant with you.
  4. Remove what is left, move the plant out of reach and keep your pet calm.

Don't

  • Do not make your pet vomit unless a vet tells you to.
  • Do not give your pet any human medicine.

Why it can be dangerous

All parts of White Snakeroot are listed as poisonous, with tremetone listed as its toxic principle.[1]

Scientific name
Eupatorium
Poisonous parts
all parts
If your pet is struggling to breathe, has collapsed, is having a seizure or can't stand up: go to the nearest vet now.

Not sure how serious it is?

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Common questions

Which parts of White Snakeroot are poisonous?

All parts of White Snakeroot are listed as poisonous.[1]

What is the toxic principle listed for White Snakeroot?

The toxic principle listed is tremetone.[1]

Is White Snakeroot dangerous for cats?

White Snakeroot is not listed for cats, but that is not proof it is safe for them.[1]

Sources

  1. Cornell University Dept. of Animal Science - Plants Poisonous to Livestock and other Animals

How this page was made: written with the help of AI from the sources below, then checked claim by claim against those sources. Urgency levels follow OkPaw’s fixed safety rules. It is guidance, not a diagnosis. How we write our pages

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