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If your cat ate olympic st. john's wort — do this now

  1. Take the plant away and clear any pieces from their mouth.
  2. Do not induce vomiting unless told to by a professional.
  3. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 now.

Olympic St. John's Wort is toxic to cats (ASPCA).

Pet emergency

My cat ate Olympic St. John's Wort — what to do

Step by step

  1. Take olympic st. john's wort away and remove any plant material from your cat's mouth so they cannot eat more.
  2. Note roughly how much was eaten and when — this helps the vet judge the risk.
  3. Do NOT induce vomiting unless a vet or poison-control specialist tells you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice.
  5. Watch for drooling, pawing at the mouth, vomiting, loss of appetite, or lethargy, and bring a leaf or photo to the appointment.

This is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide as well as the plant. When in doubt, call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435.

My cat ate olympic st. john's wort — FAQ

Is olympic st. john's wort poisonous to cats?

Yes — the ASPCA lists Olympic St. John's Wort (Hypericum olympicum) as toxic to cats. Hypericum species are listed as toxic to dogs, cats, and horses by the ASPCA. The toxic principle is hypericin, which causes photosensitisation — ulcerative dermatitis and skin inflammation on light-coloured animals exposed to sunlight after ingestion. Although H. olympicum is not individually listed by the ASPCA, its genus-level toxicity applies. Keep away from grazing animals and supervise pets around this plant.

How serious is it if my cat ate olympic st. john's wort?

Olympic St. John's Wort is toxic to cats and reactions can be significant, so treat any ingestion as urgent. Call your vet or poison control on (888) 426-4435 straight away rather than waiting to see if symptoms develop.

What symptoms should I watch for?

Signs usually appear soon after chewing: drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy. Hypericum species are listed as toxic to dogs, cats, and horses by the ASPCA. The toxic principle is hypericin, which causes photosensitisation — ulcerative dermatitis and skin inflammation on light-coloured animals exposed to sunlight after ingestion. Although H. olympicum is not individually listed by the ASPCA, its genus-level toxicity applies. Keep away from grazing animals and supervise pets around this plant. Any worsening or persistent symptoms warrant an immediate vet visit.

Should I make my cat vomit?

No — do not induce vomiting unless a vet or the ASPCA Animal Poison Control Center specifically tells you to. The wrong action can make things worse. Call (888) 426-4435 and follow professional advice.

How do I stop this happening again?

Keep olympic st. john's wort well out of reach, or swap it for an ASPCA non-toxic plant — see the best cats-safe plants list.

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