Is Hyssop Toxic to Cats?
Also known as: Garden Hyssop, Hyssopus officinalis · Hyssopus officinalis
What makes it toxic
Essential oils rich in pinocamphone and related ketones, which irritate the gut and, in significant doses, affect the nervous system.
Warning signs to watch for
Drooling, vomiting, diarrhea and mild lethargy within hours; very large amounts could add tremors or restlessness.
What to do if your cat eats it
Remove plant material, offer water and monitor. Call your vet if vomiting persists, and go in promptly if tremors or wobbliness appear.
Common questions
Is anise hyssop as risky as true hyssop?
Anise hyssop (Agastache) is a different, milder plant generally considered safer. The pinocamphone concern applies to true Hyssopus officinalis.
Can cats have hyssop tea?
Not deliberately. The concentrated oils in a brewed tea are exactly what a cat processes poorly.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.