PlantFunPurple Heart Toxic?
All parts of the plant contain needle-shaped calcium oxalate crystals (raphides) that trigger irritation on contact or ingestion
The plant is severely toxic to birds, and can cause contact dermatitis and systemic symptoms in dogs
Ingestion by grazing livestock can cause fatal nitrate poisoning within 1-2 hours of consumption
FAQ
Is Purple Heart toxic to Humans?
No specific human toxicity cases confirmed, but sap contact may cause mild to moderate skin/mucous membrane irritation, redness, swelling, and itching (Low)
Is Purple Heart toxic to Cats?
No specific feline toxicity data available, monitor for skin irritation, gastrointestinal upset or abnormal behavior if exposed (Low)
Is Purple Heart toxic to Dogs?
Sap contact causes vesicopustular skin and mucous membrane lesions, itching, redness, swelling, exudation; possible systemic signs include circulatory collapse, vomiting, abdominal pain, apathy (Moderate)
Is Purple Heart toxic to Horses?
No specific equine toxicity data available, avoid exposure to prevent potential irritation or poisoning risk (Low)
Toxicity Details
No specific human toxicity cases confirmed, but sap contact may cause mild to moderate skin/mucous membrane irritation, redness, swelling, and itching
No specific feline toxicity data available, monitor for skin irritation, gastrointestinal upset or abnormal behavior if exposed
Sap contact causes vesicopustular skin and mucous membrane lesions, itching, redness, swelling, exudation; possible systemic signs include circulatory collapse, vomiting, abdominal pain, apathy
No specific equine toxicity data available, avoid exposure to prevent potential irritation or poisoning risk
Toxicity Snapshot
First Aid & Prevention
First 30 Minutes
- • Rinse exposed skin or mucous membranes with large volumes of cool running water for at least 15 minutes immediately after exposure
- • If ingested, rinse the mouth thoroughly and offer small sips of clean water to dilute irritant compounds
- • Closely monitor for swelling, breathing difficulty, lethargy or unusual behavior for the first 2 hours post-exposure
Contact Vet Immediately
- • Presence of blistering, severe swelling, or exudation on skin or mucous membranes
- • Signs of systemic illness including vomiting, abdominal pain, lethargy, or circulatory distress
- • Exposure in birds or ingestion by grazing livestock, as severe or fatal toxicity can occur rapidly
Prevention
- • Keep the plant out of reach of pets, caged birds, and grazing livestock
- • Wear protective gloves when handling the plant to avoid contact with irritant sap
- • Avoid planting this species in pastures or areas accessible to agricultural animals
Treatment & Prognosis
- • Provide symptomatic and supportive care tailored to presenting clinical signs
- • For methaemoglobinaemia from nitrate poisoning, administer 1% methylene blue slowly intravenously at species-specific doses (9mg/kg for cattle, repeat after 30 minutes if required)
- • Administer vitamin C: initial 20mg/kg intravenous dose, followed by 30mg/kg orally 3 times daily as clinically indicated
Professional Toxicology
• Needle-shaped calcium oxalate raphides penetrate skin and mucous membranes, causing physical irritation and inflammatory reactions
• Accumulated nitrates in plant tissue lead to methaemoglobinaemia and reduced oxygen carrying capacity in grazing animals
• Plant sap triggers cell-mediated contact hypersensitivity reactions in susceptible species including dogs
Information from CliniTox veterinary text.
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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.