Is Oleander Toxic to Cats and Dogs? | Petybuzz

Q: Is oleander toxic to cats?

Highly toxic to cats. Oleander is highly toxic to dogs and cats. It can cause serious heart problems, low blood pressure, vomiting and diarrhea. Call your vet immediately.

Q: Is oleander toxic to dogs?

Highly toxic to dogs. Oleander is highly toxic to dogs and cats. It can cause serious heart problems, low blood pressure, vomiting and diarrhea. Call your vet immediately.

Is Oleander Toxic to Cats and Dogs?

Nerium oleander

Cats

🔴 Highly toxic

Dogs

🔴 Highly toxic

Short answer: Oleander is highly toxic to dogs and cats. It can cause serious heart problems, low blood pressure, vomiting and diarrhea. Call your vet immediately.

Think your pet ate oleander? Treat it as an emergency and call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.

Signs to watch for

Abnormal heart rhythm (arrhythmias)
Low blood pressure
Vomiting and diarrhea
Abdominal pain

Why it’s a problem

Toxic principle: Not specified in our source.

The ASPCA lists oleander as toxic to dogs, cats and horses and warns of serious heart problems.

Frequently asked questions

What should I do if my dog chewed oleander?

Treat it as an emergency and contact your vet or the ASPCA Animal Poison Control Center right away.

Other plants

Sago Palm
Autumn Crocus
Poinsettia
Peace Lily
Spider Plant
Hydrangea

Sources

ASPCA: Do You Know Which Flowers and Plants are Toxic to Pets?

Last checked: 2026-11-11. General information, not veterinary advice.