PlantFunYellow Oleander Toxic?
All parts of the plant are toxic, with seeds containing the highest concentration of cardiac glycosides at ~5% by weight.
Exposure causes gastrointestinal and cardiac symptoms including vomiting, diarrhea, and slowed heart rate in humans and common domestic animals.
It poses a severe fatal toxicity risk to cats, dogs, horses, and birds, and is easily confused with equally toxic common oleander.
FAQ
Is Yellow Oleander toxic to Humans?
Vomiting, diarrhea, slowed heart rate, cardiac arrhythmia, potential fatality in untreated severe cases (Severe)
Is Yellow Oleander toxic to Cats?
Vomiting, diarrhea, reduced heart rate, cardiac distress, lethargy, risk of death without prompt veterinary care (Severe)
Is Yellow Oleander toxic to Dogs?
Vomiting, diarrhea, reduced heart rate, cardiac distress, lethargy, risk of death without prompt veterinary care (Severe)
Is Yellow Oleander toxic to Horses?
Vomiting, diarrhea, reduced heart rate, cardiac arrhythmia, colic, risk of fatal cardiac failure (Severe)
Toxicity Details
Vomiting, diarrhea, slowed heart rate, cardiac arrhythmia, potential fatality in untreated severe cases
Vomiting, diarrhea, reduced heart rate, cardiac distress, lethargy, risk of death without prompt veterinary care
Vomiting, diarrhea, reduced heart rate, cardiac distress, lethargy, risk of death without prompt veterinary care
Vomiting, diarrhea, reduced heart rate, cardiac arrhythmia, colic, risk of fatal cardiac failure
Toxicity Snapshot
First Aid & Prevention
First 30 Minutes
- • If ingestion is confirmed and the affected individual is conscious, rinse their mouth thoroughly with clean water to remove residual plant material
- • Do not induce vomiting or administer any food, drink, or home remedies unless explicitly instructed by a medical or veterinary professional
- • Collect a sample of the plant for identification to speed up clinical treatment
Contact Vet Immediately
- • Any confirmed or suspected ingestion of any part of the plant, regardless of the amount consumed
- • Onset of symptoms including vomiting, diarrhea, lethargy, or irregular heart rate after exposure
- • Sap contact with eyes, open wounds, or sensitive skin leading to persistent irritation
Prevention
- • Keep the plant out of reach of children, pets, and livestock, especially horses
- • Wear disposable gloves and eye protection when pruning or handling the plant to avoid sap exposure
- • Do not burn plant clippings, as toxic fumes may cause respiratory irritation
Treatment & Prognosis
- • Administer activated charcoal to bind unabsorbed toxins remaining in the gastrointestinal tract
- • Provide continuous cardiac monitoring to track and regulate heart rate and rhythm abnormalities
- • Deliver supportive care including IV fluid therapy and anti-emetics to manage dehydration and vomiting
- • Administer cardiac glycoside-specific antidotes if clinically indicated for severe cases
Professional Toxicology
• Cardenolide compounds inhibit sodium-potassium ATPase pumps in cardiac muscle cells
• This disruption alters normal cardiac electrical activity, leading to bradycardia (slow heart rate) and arrhythmia
• Toxic compounds also irritate the gastrointestinal lining, causing vomiting and diarrhea
Information from CliniTox veterinary text.
The following plants look similar and may be confused:
Related Toxic Plants
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Data Sources
This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.