Marsh spurge Toxic?
All plant parts containing milky sap are toxic, and active terpene compounds do not degrade during storage or drying.
Exposure causes severe gastrointestinal distress, neurological abnormalities, heart rhythm disorders, and eye inflammation; toxins can be excreted in cow milk, making it unsafe for consumption.
The plant has a sharp, unpleasant odor that reduces accidental ingestion risk, but dried plant material in forage remains dangerous for livestock.
FAQ
Is Marsh spurge toxic to Humans?
Bloody diarrhea, vomiting, colic, dizziness, seizures, circulatory collapse, irregular heart rhythm, bloody urine; eye contact causes severe conjunctivitis and corneal inflammation (High)
Is Marsh spurge toxic to Cats?
Expected symptoms include oral mucosa irritation, excessive salivation, vomiting, bloody diarrhea, abdominal pain, lethargy, and potential organ damage with large ingestions; eye contact causes severe eye inflammation (High)
Is Marsh spurge toxic to Dogs?
Expected symptoms include oral mucosa irritation, excessive salivation, vomiting, bloody diarrhea, abdominal pain, lethargy, and potential organ damage with large ingestions; eye contact causes severe eye inflammation (High)
Is Marsh spurge toxic to Horses?
Expected symptoms include oral mucosa irritation, excessive salivation, colic, bloody diarrhea, uncoordinated movement, and potential organ damage with large ingestions; eye contact causes severe eye inflammation (High)
Toxicity Details
Bloody diarrhea, vomiting, colic, dizziness, seizures, circulatory collapse, irregular heart rhythm, bloody urine; eye contact causes severe conjunctivitis and corneal inflammation
Expected symptoms include oral mucosa irritation, excessive salivation, vomiting, bloody diarrhea, abdominal pain, lethargy, and potential organ damage with large ingestions; eye contact causes severe eye inflammation
Expected symptoms include oral mucosa irritation, excessive salivation, vomiting, bloody diarrhea, abdominal pain, lethargy, and potential organ damage with large ingestions; eye contact causes severe eye inflammation
Expected symptoms include oral mucosa irritation, excessive salivation, colic, bloody diarrhea, uncoordinated movement, and potential organ damage with large ingestions; eye contact causes severe eye inflammation
Toxicity Snapshot
First Aid & Prevention
First 30 Minutes
- • If ingested, rinse mouth thoroughly with clean water; do not induce vomiting unless instructed by a medical professional or veterinarian
- • If sap contacts skin, wash affected area immediately with soap and cold water for at least 10 minutes
- • If sap contacts eyes, flush continuously with lukewarm clean water for 15+ minutes, lifting upper and lower eyelids regularly
- • Remove all remaining plant material from the mouth, skin, or fur of exposed pets or livestock immediately
Contact Vet Immediately
- • Any confirmed or suspected ingestion of the plant by humans, companion animals, or livestock
- • Onset of symptoms including vomiting, bloody diarrhea, difficulty breathing, seizures, or severe eye pain after exposure
- • Development of abnormal urine color, irregular heart rate, or uncoordinated movement post-exposure
Prevention
- • Avoid planting Marsh spurge in areas accessible to children, pets, or grazing livestock
- • Wear protective gloves and eye goggles when handling any Euphorbia species to prevent sap contact
- • Inspect hay and dried forage for Euphorbia species before feeding to livestock, as toxins remain active after drying
Treatment & Prognosis
- • Perform decontamination: administer activated charcoal for recent ingestions, gastric lavage only under professional supervision for severe cases
- • Provide supportive symptomatic care: fluid therapy to prevent dehydration from vomiting/diarrhea, antiarrhythmics for heart rhythm abnormalities, pain management for colic
- • Treat eye exposure with prescribed topical anti-inflammatories and antibiotics to prevent secondary infection and permanent eye damage
Professional Toxicology
• Irritant terpene compounds cause immediate mucosal and tissue irritation upon contact or ingestion
• Toxins disrupt cellular function, leading to gastrointestinal damage, organ injury, and impairment of cardiac and nervous system function
• Toxic compounds are not degraded by drying or long-term storage, so dried plant material remains fully toxic
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.


