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Toxic: keep away from dogs

DogSafe severity score
9/10Dangerous at any amount

All parts contain cardiac glycosides that disrupt the heart.

Call a vet or poison control now. Do not wait for symptoms.

ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661. A consultation fee may apply.

Part of our guide to Is Oleander Safe for Dogs? Identification, Symptoms & Next Steps.

Check Oleander for your dog

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Any amount of Oleander is an emergency: call now

Why Oleander is dangerous

All parts contain cardiac glycosides that disrupt the heart. A common landscaping shrub, especially out West.

Signs to watch for

Vomiting, slow/irregular heartbeat, weakness, collapse

Related items

Check the exact item or ingredient before assuming two similar exposures carry the same risk.

What to do next

Go to an emergency vet right away.

🚨Step-by-step: what to do in the first 10 minutes →
Animal poison control

A closer look at oleander

All parts contain cardiac glycosides that disrupt the heart. A common landscaping shrub, especially out West. The details below use the specific facts for this exposure, rather than treating it like every other plant question.

1. Start with the exact exposure

For a closely related comparison, read Heliotrope. Dangerous in small amounts: affects heart rhythm and can be fatal.

2. Use the facts to decide whether to monitor or call

Another helpful reference is Lily of the Valley. None: treat any ingestion as an emergency. Any amount of leaves, flowers or stems, immediately.

3. If the details are uncertain

Follow the first 10 minutes guide. Go to an emergency vet right away.

FAQ

How much Oleander is dangerous?

Dangerous in small amounts: affects heart rhythm and can be fatal.

Can I treat this at home?

None: treat any ingestion as an emergency.

When should I call the vet?

Any amount of leaves, flowers or stems, immediately.

Compiled from veterinary poison-control and medical reference sources, including the ASPCA Animal Poison Control Center, the Pet Poison Helpline, and the Merck Veterinary Manual. This is general educational information, not a diagnosis or a substitute for examination by your veterinarian. DogSafe's severity ratings are our own assessment, calculated from published guidance and your dog's weight. In an emergency, call ASPCA Animal Poison Control at 888-426-4435 or the Pet Poison Helpline at 855-764-7661.