Caper spurge Toxic?

Updated 2026-03-06| 3 min read| 2,793 found this helpful
Caper spurge
1

All plant parts containing milky sap are toxic; terpene toxins remain fully active after storage and drying.

2

Birds face severe fatal toxicity risk, while mammal ingestion can cause gastrointestinal damage, organ injury, and cardiac/neurological symptoms.

3

Toxins are excreted in cow's milk, posing secondary poisoning risk to humans who consume contaminated milk products.

FAQ

Is Caper 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 Caper spurge toxic to Cats?

Species-specific symptom data not recorded; expected effects include oral irritation, vomiting, diarrhea, and skin/eye irritation on contact with sap (Moderate)

Is Caper spurge toxic to Dogs?

Species-specific symptom data not recorded; expected effects include oral irritation, vomiting, diarrhea, and skin/eye irritation on contact with sap (Moderate)

Is Caper spurge toxic to Horses?

Species-specific symptom data not recorded; expected effects include oral irritation, colic, bloody diarrhea, and skin/eye irritation on contact with sap (Moderate)

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Toxicity Details

Humans
High

Bloody diarrhea, vomiting, colic, dizziness, seizures, circulatory collapse, irregular heart rhythm, bloody urine; eye contact causes severe conjunctivitis and corneal inflammation

Cats
Moderate

Species-specific symptom data not recorded; expected effects include oral irritation, vomiting, diarrhea, and skin/eye irritation on contact with sap

Dogs
Moderate

Species-specific symptom data not recorded; expected effects include oral irritation, vomiting, diarrhea, and skin/eye irritation on contact with sap

Horses
Moderate

Species-specific symptom data not recorded; expected effects include oral irritation, colic, bloody diarrhea, and skin/eye irritation on contact with sap

Toxicity Snapshot

Toxic PartsAll plant parts that contain milky sap
Exposure RouteIngestion of fresh or dried plant material, skin/eye contact with milky sap, secondary ingestion of contaminated cow milk
Toxic CompoundsIngenol esters (diterpene); Phorbol esters (diterpene); Euphol (triterpene)

First Aid & Prevention

First 30 Minutes

  • • For ingestion: Rinse mouth thoroughly with clean water; do not induce vomiting unless directed by a medical/vet professional
  • • For skin contact: Wash affected area with soap and cold running water for at least 15 minutes to remove all sap
  • • For eye contact: Flush eyes with lukewarm running water for 15+ minutes, holding eyelids open to fully clear exposed tissue
  • • Move exposed pets/livestock away from the plant immediately to prevent further ingestion

Contact Vet Immediately

  • • Any confirmed ingestion of the plant by pets, horses, or grazing livestock
  • • Presence of severe symptoms including bloody stool/urine, seizures, disorientation, or difficulty breathing
  • • Eye exposure leading to redness, pain, or vision changes in humans or animals
  • • Confirmed exposure of dairy cattle to avoid secondary poisoning via contaminated milk

Prevention

  • • Remove all caper spurge plants from areas accessible to children, pets, and grazing livestock
  • • Wear waterproof gloves and protective goggles when handling the plant to avoid contact with irritant sap
  • • Inspect hay and dried forage for contamination before feeding to livestock, as toxins remain active after drying

Treatment & Prognosis

  • • Decontamination: Administer activated charcoal for recent ingestions, under direction of a medical/vet professional
  • • Symptomatic care: Provide intravenous fluid therapy to treat dehydration, anti-emetics to control vomiting, and pain relief for colic
  • • Treat eye exposure with prescribed topical anti-inflammatory and antibiotic medications to prevent permanent corneal damage
  • • Monitor cardiac and renal function for 24-48 hours post-exposure to detect and address organ injury
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Professional Toxicology

Scientific NameEuphorbia lathyris L.
AliasesPaper spurge、Garden spurge、Purging spurge
Toxicity Grade
HumansHigh
CatsModerate
DogsModerate
HorsesModerate
Target Organs
Gastrointestinal tractOral mucosaEyesKidneysHeartCentral nervous system
Mechanism of Action

• Irritant diterpene esters cause immediate inflammatory damage to mucosal tissue in the mouth, gastrointestinal tract, and eyes

• Toxins disrupt normal cardiac rhythm and damage renal tissue, leading to bloody urine and circulatory collapse in severe cases

• Terpene compounds are not degraded by drying or long-term storage, so contaminated forage remains toxic

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Birds: Severe (+++) toxicity; ingestion of small amounts can cause rapid fatal poisoning
Cattle: Poisoning possible via contaminated dried forage; symptoms include colic, vomiting, bloody diarrhea, bloody urine, muscle tremors, and disorientation; milk may become reddish or off-flavored as toxins are excreted
Sheep: Ingestion of fresh plant causes severe swelling and inflammation of the oral mucosa, excessive salivation, and diarrhea; full recovery is typical after moving to non-contaminated pasture
Confusion Risk

The following plants look similar and may be confused:

Other spurge species Euphorbia spp.
Most Euphorbia species produce similar irritant milky sap and share overlapping leaf/plant morphology; almost all species have comparable toxicity profiles
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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.

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