Spindle Tree Toxic?

Updated 2026-03-06| 5 min read| 3,620 found this helpful

Euonymus atropurpurea

Spindle Tree is confirmed toxic to cats, dogs, and horses per ASPCA clinical data

Its toxic active components are alkaloids and cardenolides that impact digestive and cardiac function

Large ingestions can cause life-threatening heart rhythm abnormalities in affected animals

FAQ

Is Spindle Tree toxic to Humans?

No formal human toxicity data is documented; ingestion of large quantities may cause gastrointestinal distress and potential cardiac effects consistent with animal case reports (Low)

Is Spindle Tree toxic to Cats?

Vomiting, diarrhea, abdominal pain, weakness; heart rhythm abnormalities may occur with large dose ingestion (Moderate)

Is Spindle Tree toxic to Dogs?

Vomiting, diarrhea, abdominal pain, weakness; heart rhythm abnormalities may occur with large dose ingestion (Moderate)

Is Spindle Tree toxic to Horses?

Vomiting, diarrhea, abdominal pain, weakness; heart rhythm abnormalities may occur with large dose ingestion (Moderate)

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Toxicity Details

Humans

Low

No formal human toxicity data is documented; ingestion of large quantities may cause gastrointestinal distress and potential cardiac effects consistent with animal case reports

Cats

Moderate

Vomiting, diarrhea, abdominal pain, weakness; heart rhythm abnormalities may occur with large dose ingestion

Dogs

Moderate

Vomiting, diarrhea, abdominal pain, weakness; heart rhythm abnormalities may occur with large dose ingestion

Horses

Moderate

Vomiting, diarrhea, abdominal pain, weakness; heart rhythm abnormalities may occur with large dose ingestion

Toxicity Snapshot

Toxic PartsAll plant parts are toxic, with highest concentrations of active compounds found in the bark, seeds, and ripe fruits

Exposure RoutePrimary exposure route is accidental ingestion; mild skin irritation may occur in sensitive individuals after prolonged contact with plant sap

Toxic CompoundsAlkaloids; Cardenolides

First Aid & Prevention

First 30 Minutes

• Remove all remaining plant material from the affected animal's mouth and restrict further access to the plant
• Collect a full sample of the ingested plant to provide to veterinary staff for fast identification
• Do not induce vomiting or administer home remedies unless explicitly directed to do so by a licensed veterinarian

Contact Vet Immediately

• Your cat, dog, or horse has ingested any quantity of Spindle Tree, even if no symptoms are present
• The animal exhibits vomiting, diarrhea, abdominal pain, weakness, or irregular heart rate after exposure
• You confirm a large volume of the plant was consumed, as this raises risk of life-threatening cardiac effects

Prevention

• Avoid planting Spindle Tree in yards, pastures, or other areas accessible to pets, livestock, or young children
• Label existing Spindle Tree plants on your property to alert others of their toxic properties
• Regularly clean up fallen leaves, fruits, and pruned branches from Spindle Trees to reduce accidental ingestion risk

Treatment & Prognosis

• Veterinary decontamination including activated charcoal administration or gastric lavage for recent ingestions
• Supportive care including IV fluid therapy, anti-emetics, and pain management to address gastrointestinal symptoms
• Continuous cardiac monitoring and anti-arrhythmic medication if heart rhythm abnormalities develop

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Professional Toxicology

Scientific NameEuonymus atropurpurea

AliasesWahoo、Burning Bush

Toxicity Grade

HumansLow

CatsModerate

DogsModerate

HorsesModerate

Target Organs

Gastrointestinal tractHeartCentral nervous system

Mechanism of Action

• Cardenolide compounds disrupt sodium-potassium pump function in cardiac muscle cells, leading to altered electrical activity and potential arrhythmia

• Alkaloid components irritate the lining of the gastrointestinal tract, triggering vomiting, diarrhea, and abdominal pain shortly after ingestion

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Suspected moderately toxic; ingestion is expected to cause gastrointestinal distress and cardiac effects similar to those observed in horses

Small companion mammals (rabbits, guinea pigs, hamsters): High toxicity risk even from small ingestions, due to low body weight and heightened sensitivity to cardenolide compounds

Confusion Risk

The following plants look similar and may be confused:

Winged Spindle Tree Euonymus alatus

Also commonly called Burning Bush, sharing an alias with Euonymus atropurpurea; it is distinguishable by the prominent corky 'wings' running along its stems, which are absent on E. atropurpurea

Common Smoke Bush Cotinus coggygria

Sometimes referred to as Burning Bush due to its vivid red fall foliage; it can be differentiated by its distinctive fuzzy, smoke-like plumes of flowers, which are not produced by Spindle Trees

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Related Toxic Plants

Oriental Bittersweet

Celastrus orbiculatus

Moderate toxicity

European Spindle Tree

Euonymus europaeus

Moderate toxicity

African Spike Thorn

Maytenus senegalensis

High toxicity

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Data Sources

1. ASPCA Animal Poison Control

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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