Is Euonymus Poisonous? – Toxicity to Pets and Humans

Euonymus is toxic to dogs, cats, horses, and humans. The genus includes popular ornamental shrubs commonly planted in gardens, including burning bush (Euonymus atropurpureus) and spindle tree (Euonymus europaeus). All parts of the plant contain alkaloids and cardenolides, a type of cardiac glycoside. The berries are the most common source of accidental poisoning in both children and pets.

What Makes Euonymus Toxic?

The plant contains alkaloids and cardenolides throughout its leaves, bark, and fruit. Cardenolides can disrupt heart rhythm at high doses. The seeds and fruit pulp carry the highest concentration of toxins, but the bark and leaves are also toxic.

Which Parts Are Most Dangerous?

The berries are the primary concern, particularly for children who may be drawn to their color and appearance. The leaves and bark also contain toxins but are less commonly the source of accidental ingestion. Treat any part of the plant as potentially hazardous.

Symptoms of Euonymus Ingestion

Dogs and cats: Vomiting, diarrhea, abdominal pain, and weakness are the most commonly reported signs. With large doses, heart rhythm abnormalities can develop.

Humans and children: Symptoms include vomiting, diarrhea, drooling, and abdominal cramping. Severe poisoning from significant fruit consumption has been linked to liver and kidney damage in documented cases. Children are at greatest risk because the colorful berries may be mistaken for edible fruit.

What to Do If Someone Ingests Euonymus

1. Remove any remaining plant material from the mouth if it can be done safely.
2. Rinse the mouth with water.
3. Do not induce vomiting unless directed by a medical professional.
4. Call poison control at 1-800-222-1222 (US) or your vet immediately.
5. If your pet shows signs of heart irregularity, labored breathing, or extreme weakness, treat it as an emergency and go to a vet without delay.

Even when initial symptoms seem mild, contact poison control or your vet. Cardiac effects from cardenolides can be delayed.

Safe Handling

• Wear gloves when pruning euonymus, especially during berry season.
• Keep children away from the plant when berries are present.
• Consider replacing euonymus with a non-toxic alternative if young children or plant-chewing pets have free access to the garden.
• Clear fallen berries from the ground regularly rather than leaving them accessible.

Frequently Asked Questions

Is burning bush toxic to dogs? Yes. Burning bush (Euonymus atropurpureus) is toxic to dogs. Expected symptoms include vomiting, diarrhea, abdominal pain, and weakness. Contact your vet promptly after any suspected ingestion.

Are euonymus berries dangerous to children? Yes. The berries are the most toxic part of the plant. Children should not handle or eat them. Call poison control immediately if ingestion occurs.

Can euonymus cause heart problems? In large doses, the cardenolide content can affect heart rhythm in dogs, cats, and horses. This is not a typical outcome from minor exposure but is a reason to seek prompt veterinary or medical guidance after significant ingestion.

Does toxicity vary between euonymus species? Yes. E. atropurpureus and E. europaeus are the most commonly cited in toxicity reports, but the whole genus should be treated as potentially toxic. Do not assume a species is safe based on name alone.