Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Spotted Water Hemlock - what should I do?
Cicuta maculata
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Excessive salivation, muscle twitching, seizures, respiratory distress, and potential cardiac arrest.
Escalation note
This plant is extremely lethal; ingestion of even a small amount can cause rapid onset of severe neurological symptoms. Seek emergency veterinary care immediately if ingestion is suspected.
First aid at home
Pet Poison Helpline specifically warns that hydrogen peroxide is never safe to give to cats and can cause stomach bleeding, so do not attempt to induce vomiting at home. Call ASPCA Animal Poison Control at (888) 426-4435 or Pet Poison Helpline at (855) 764-7661 and transport the cat to the nearest emergency veterinarian.
What to watch for
ASPCA reports diarrhea, seizures, tremors, severe abdominal pain, dilated pupils, fever, bloat, respiratory depression, and death. Pet Poison Helpline adds that cats specifically may show agitation, drooling, and paralysis.
Time window
Pet Poison Helpline indicates clinical signs can begin shortly after ingestion; specific recovery durations are not documented because severe poisoning is often fatal.
When to call the vet
Call immediately on any suspected exposure — do not wait for symptoms to appear. There is no antidote, and outcomes depend on rapid supportive care.
What this means for your cat
Cats: extremely dangerous. The toxin cicutoxin acts directly on neurons in the brain and central nervous system, and Pet Poison Helpline notes that all parts of the plant are poisonous, with the highest concentration in the roots. Even small ingestion can cause rapid, severe neurological signs.
Sources: ASPCA, Pet Poison Helpline.
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.