Is Poison Hemlock Toxic to Cats?

Yes — Poison Hemlock is severely toxic to cats

Poison Hemlock grows wild along roadsides and ditches and resembles wild carrot. All parts are lethal. Death results from ascending paralysis of the respiratory muscles.

Symptoms in Cats

If your cat eats Poison Hemlock, watch for these symptoms (onset: 30 minutes to 2 hours):

Trembling
Excessive salivation
Dilated pupils
Paralysis
Respiratory failure

What To Do

Veterinary emergency. Can cause respiratory paralysis and death. No specific antidote.

This is a veterinary emergency for cats. Call your vet or ASPCA Poison Control (888) 426-4435 immediately.

Quick Facts

Scientific Name

Conium maculatum

Also Toxic to Dogs?

Yes (severe)

Toxic Compound

Piperidine alkaloids (coniine)

Toxic Parts

all parts, seeds, roots

Sources: ASPCA Animal Poison Control Center, Pet Poison Helpline. View full Poison Hemlock toxicity profile.