Wahoo Toxic?

Updated 2026-03-06| 5 min read| 959 found this helpful

Wahoo is confirmed toxic to cats, dogs, and horses per ASPCA toxicology data, with no confirmed severe human toxicity reports.

Its active toxic compounds are alkaloids and cardenolides, which cause gastrointestinal distress and potential cardiac arrhythmias at high doses.

Any suspected ingestion by pets or livestock requires immediate medical or veterinary consultation to avoid severe complications.

FAQ

Is Wahoo toxic to Humans?

No confirmed severe human poisoning cases are documented; ingestion may lead to mild to moderate gastrointestinal distress based on its toxic composition. (Low)

Is Wahoo toxic to Cats?

Vomiting, diarrhea, abdominal pain, general weakness, and potentially life-threatening heart rhythm abnormalities following ingestion of large doses. (Moderate)

Is Wahoo toxic to Dogs?

Vomiting, diarrhea, abdominal pain, general weakness, and potentially life-threatening heart rhythm abnormalities following ingestion of large doses. (Moderate)

Is Wahoo toxic to Horses?

Vomiting, diarrhea, abdominal pain, general weakness, and potentially life-threatening heart rhythm abnormalities following ingestion of large doses. (Moderate)

Not sure which plant? Snap a photo to ID in 1 secondGet App

Toxicity Details

Humans

Low

No confirmed severe human poisoning cases are documented; ingestion may lead to mild to moderate gastrointestinal distress based on its toxic composition.

Cats

Moderate

Vomiting, diarrhea, abdominal pain, general weakness, and potentially life-threatening heart rhythm abnormalities following ingestion of large doses.

Dogs

Moderate

Vomiting, diarrhea, abdominal pain, general weakness, and potentially life-threatening heart rhythm abnormalities following ingestion of large doses.

Horses

Moderate

Vomiting, diarrhea, abdominal pain, general weakness, and potentially life-threatening heart rhythm abnormalities following ingestion of large doses.

Toxicity Snapshot

Toxic PartsAll plant parts are considered potentially toxic, with highest concentrations of active compounds recorded in leaves, bark, and mature fruit/seed.

Exposure RoutePrimary exposure route is accidental ingestion; direct skin contact may cause mild, temporary irritation in sensitive individuals but does not cause systemic toxicity.

Toxic CompoundsAlkaloids; Cardenolides

First Aid & Prevention

First 30 Minutes

• Remove any remaining plant material from the mouth of the exposed individual and rinse the mouth thoroughly with clean cool water
• If the exposed animal or human is fully alert and not actively vomiting, do not induce vomiting unless explicitly instructed by a medical/veterinary professional
• Collect a full sample of the ingested plant to provide to healthcare providers for accurate identification and treatment guidance

Contact Vet Immediately

• Any confirmed or suspected ingestion of Wahoo plant material by cats, dogs, or horses, even if no symptoms are initially present
• The exposed animal exhibits visible symptoms including vomiting, diarrhea, abdominal tenderness, weakness, or irregular pulse
• A large volume of plant material has been ingested, as this increases risk of life-threatening cardiac arrhythmias

Prevention

• Remove wild Wahoo specimens from pet play areas, livestock pastures, and spaces accessible to young children
• Clearly label ornamental Wahoo plants in home gardens to prevent accidental ingestion by people or pets
• Train pets and livestock to avoid consuming unknown wild or ornamental plants to reduce exposure risk

Treatment & Prognosis

• Administer activated charcoal under professional supervision to absorb unprocessed toxic compounds if ingestion occurred within the prior 2 hours
• Provide supportive care including IV fluid therapy, anti-emetic medications, and pain relief to address gastrointestinal symptoms
• Continuously monitor cardiac rhythm for 24 to 48 hours after large dose ingestion to detect and treat arrhythmias promptly

Emergency? Open PlantFun for real-time AI guidanceGet App

Professional Toxicology

Scientific NameEuonymus occidentalis

AliasesBurning Bush、Spindle Tree

Toxicity Grade

HumansLow

CatsModerate

DogsModerate

HorsesModerate

Target Organs

Gastrointestinal tractHeartCentral nervous system

Mechanism of Action

• Alkaloid compounds irritate the gastrointestinal mucosa, leading to vomiting, diarrhea, and abdominal pain

• Cardenolide compounds inhibit sodium-potassium ATPase in cardiac muscle cells, disrupting normal heart rhythm at sufficient doses

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, and goats: No species-specific toxicity data is available, but ingestion is expected to produce similar gastrointestinal and cardiac symptoms as observed in horses if consumed in large quantities

Small companion mammals (rabbits, guinea pigs, hamsters): Suspected moderate toxicity; ingestion may lead to digestive distress, weakness, and potential cardiac complications at high doses

Wild and domestic birds: Limited data suggests birds are less susceptible to cardenolide toxicity, but large ingestions may still cause mild gastrointestinal upset

Confusion Risk

The following plants look similar and may be confused:

Winged Burning Bush Euonymus alatus

Visually similar due to shared bright red autumn foliage and common 'Burning Bush' alias; key distinguishing feature is the corky 'wing' growths along the stems of E. alatus, which are not present on E. occidentalis

European Spindle Tree Euonymus europaeus

Shares the common 'Spindle Tree' alias and similar leaf/fruit morphology; E. occidentalis is native to North America, while E. europaeus is an introduced Eurasian species with smaller, more vividly colored fruit

Use PlantFun to scan and avoid misidentificationGet App

Related Toxic Plants

Oriental Bittersweet

Celastrus orbiculatus

Moderate toxicity to humans and animals, with highest risk from ingestion of its toxic berries

American Bittersweet

Celastrus scandens

Low to moderate toxicity, causing gastrointestinal distress if berries or foliage are ingested

Japanese Spindle

Euonymus japonicus

Moderate toxicity, triggering digestive symptoms and potential cardiac effects with large ingestions

Download PlantFun App

Identify, grow and care for plants effectively!

Instant Plant ID

Take a photo to quickly identify plants.

Smart Care Reminders

Generate watering and care schedules.

Toxicity & Disease Diagnosis

Identify toxic plants and pests with treatment advice.

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.