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If your cat ate hemlock water parsnip — do this now

  1. Take the plant away and clear any pieces from their mouth.
  2. Do not induce vomiting unless told to by a professional.
  3. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 now.

Hemlock Water Parsnip is toxic to cats (ASPCA).

Pet emergency

My cat ate Hemlock Water Parsnip — what to do

Step by step

  1. Take hemlock water parsnip away and remove any plant material from your cat's mouth so they cannot eat more.
  2. Note roughly how much was eaten and when — this helps the vet judge the risk.
  3. Do NOT induce vomiting unless a vet or poison-control specialist tells you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice.
  5. Watch for drooling, pawing at the mouth, vomiting, loss of appetite, or lethargy, and bring a leaf or photo to the appointment.

This is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide as well as the plant. When in doubt, call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435.

My cat ate hemlock water parsnip — FAQ

Is hemlock water parsnip poisonous to cats?

Yes — the ASPCA lists Hemlock Water Parsnip (Sium suave) as toxic to cats. Not listed on the ASPCA database by name, but the stems and leaves of Sium suave are reported as toxic to livestock. This plant belongs to the same family and habitat as some of the most poisonous plants in North America (e.g. Cicuta spp.); it is extremely difficult to distinguish from water hemlock in the field. Treat as toxic for all animals and do not allow pets to graze in areas where it grows.

How serious is it if my cat ate hemlock water parsnip?

Hemlock Water Parsnip is toxic to cats and reactions can be significant, so treat any ingestion as urgent. Call your vet or poison control on (888) 426-4435 straight away rather than waiting to see if symptoms develop.

What symptoms should I watch for?

Signs usually appear soon after chewing: drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy. Not listed on the ASPCA database by name, but the stems and leaves of Sium suave are reported as toxic to livestock. This plant belongs to the same family and habitat as some of the most poisonous plants in North America (e.g. Cicuta spp.); it is extremely difficult to distinguish from water hemlock in the field. Treat as toxic for all animals and do not allow pets to graze in areas where it grows. Any worsening or persistent symptoms warrant an immediate vet visit.

Should I make my cat vomit?

No — do not induce vomiting unless a vet or the ASPCA Animal Poison Control Center specifically tells you to. The wrong action can make things worse. Call (888) 426-4435 and follow professional advice.

How do I stop this happening again?

Keep hemlock water parsnip well out of reach, or swap it for an ASPCA non-toxic plant — see the best cats-safe plants list.

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