Is Oleander Toxic to Dogs and Cats?

Cats · ToxicDogs · Toxic

Yes. Oleander is highly toxic to dogs and cats because it contains substances that affect the heart.

Botanical name: Nerium oleander

If your pet has eaten a toxic plant, contact your veterinarian or an emergency animal hospital right away and bring a photo or piece of the plant. In the US you can also call the ASPCA Animal Poison Control Center at (888) 426-4435 or the Pet Poison Helpline at (855) 764-7661 (fees may apply).

Why

Every part of the oleander, including the leaves, flowers, stems and sap, contains cardiac glycosides. These substances interfere with the heart's rhythm and can be fatal.

Oleander is a common ornamental shrub in warm climates. Dried leaves and clippings remain toxic, so garden waste can also be a risk.

How to recognize it

An evergreen shrub with narrow, leathery, lance-shaped leaves and clusters of pink, white, red or yellow flowers. It is widely planted in hedges, gardens and along roads in warm, dry climates.

Signs to watch for

  • Drooling, vomiting and diarrhea
  • Abdominal pain
  • Slow, fast or irregular heartbeat
  • Weakness, trembling or collapse

What to do

  • Contact a veterinarian immediately if your pet chews any part of an oleander.
  • Do not let pets drink water from containers where oleander clippings have soaked.
  • Dispose of pruned branches where pets cannot reach them.

Pet-safe alternatives

Looking for something similar without the risk? These plants are listed as non-toxic to cats and dogs.

Related plants

← All plants

Sources

  • ASPCA Animal Poison Control Center. Toxic and Non-Toxic Plant List (dogs, cats).
  • Merck Veterinary Manual. Toxicology section.