St. John’s Wort

Additional Common Names: Klamath Weed
Scientific Name: Hypericum perforatum
Family: Clusiaceae
Toxicity: Toxic to Dogs, Toxic to Cats, Toxic to Horses
Toxic Principles: Hypericin
Clinical Signs: Photosensitization (ulcerative and exudative dermatitis).

If you suspect your pet may have ingested a potentially toxic substance, call the APCC at (888) 426-4435 or contact your local veterinarian as soon as possible.*

* A $65 consultation fee may apply.

Browse Toxic Plant Gallery List »