Is Stinging Nettle Toxic to Cats?

Yes — Stinging Nettle is mildly toxic to cats

Stinging nettle causes immediate localized pain through tiny hairs that inject histamine and other irritants. While not systemically toxic, the sting is very painful for pets.

Symptoms in Cats

If your cat eats Stinging Nettle, watch for these symptoms (onset: Immediate):

Localized pain
Swelling
Itching
Drooling
Pawing at face

What To Do

Apply cold compress to affected area. Antihistamine may help. Usually resolves within hours.

Quick Facts

Scientific Name

Urtica dioica

Also Toxic to Dogs?

Yes (mild)

Toxic Compound

Histamine, formic acid, serotonin

Toxic Parts

leaves, stems (stinging hairs)

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