PupkeeperToxicEmergency
Is oleander toxic to dogs?
Highly toxic. All parts of oleander contain heart poisons that can cause vomiting, an irregular heartbeat, collapse and death.
If your dog ate or touched this, call your vet or a pet poison line now
United States
Poison lines in other countries: United Kingdom, Australia, Canada, New Zealand
What to do now
- Call your vet or a pet poison line now.
- Take any plant pieces away and rinse your dog's mouth with water.
- Bring a piece of the plant in a bag, or a photo, to help identify it.
Don't
- Don't make your dog vomit unless a vet tells you to.
Signs to watch for
- Drooling
- Vomiting
- Diarrhea
- Belly pain
- Loss of appetite
- Irregular heartbeat
- Weakness or collapse
When signs appear: Often within 2 hours
Why
Oleander contains oleandrin and other cardiac glycosides, which affect the heart. The toxin is found throughout the plant.
Sources
- ASPCA Animal Poison Control: Oleander
- Pet Poison Helpline: Oleander
- Merck Veterinary Manual: Houseplants and Ornamentals Toxic to Animals
Guide reviewed 9 October 2026.
General information from the sources above, not a diagnosis. When in doubt, call your vet.