Pet hazard register

St John's wort

Wild plant and herbal supplement with yellow flowers and leaves that show tiny light spots when held to the light. St John's wort.

If you suspect exposure

Contact a veterinarian or emergency veterinary service.

Dyrli cannot assess what applies to your pet.

The information has been checked against the pages linked under each result.

This is general information. Dyrli cannot assess what applies to your pet.

Representative photograph: St John's wort.
Image

Representative plant image; not a basis for species identification.

Image credit: Didier DescouensCC BY-SA 4.0

What the answers mean

Important to know · Dyrli does not provide doses, treatment or an urgency assessment.

  • Known hazardThis is stated to be harmful to this animal.
  • May be harmfulThis is stated to possibly be harmful to this animal.
  • UnclearWe did not find a clear answer for this animal.

Answers for each animal

Horse

Known hazard

This is stated to be harmful to this animal.

Read more at
ASPCA Animal Poison Control
Date shown
28 Aug 2026
Last checked
28 Aug 2026

Dog

Known hazard

This is stated to be harmful to this animal.

Read more at
ASPCA Animal Poison Control
Date shown
28 Aug 2026
Last checked
28 Aug 2026

Cat

Known hazard

This is stated to be harmful to this animal.

Read more at
ASPCA Animal Poison Control
Date shown
28 Aug 2026
Last checked
28 Aug 2026

Not checked yet

We have not checked this for these animals yet. That does not mean it is safe.

See the full pet hazard register
St John's wort · Pet hazard register · Dyrli