Petty spurge Toxic?

Updated 2026-03-06| 3 min read| 4,918 found this helpful

All plant parts containing milky sap are toxic, with terpenes remaining active even after drying or storage

Ingestion causes severe digestive distress, cardiac arrhythmia, neurological symptoms, and bloody urine

Eye contact with sap triggers severe conjunctivitis and corneal inflammation requiring immediate medical care

FAQ

Is Petty spurge toxic to Humans?

Bloody diarrhea, vomiting, colic, dizziness, seizures, circulatory collapse, cardiac arrhythmia, bloody urine; eye contact causes severe conjunctivitis and corneal inflammation (High)

Is Petty spurge toxic to Cats?

Species-specific symptom data not recorded; expected to present with oral irritation, vomiting, diarrhea, and potential neurological or cardiac symptoms consistent with Euphorbia genus toxicity (Moderate)

Is Petty spurge toxic to Dogs?

Is Petty spurge toxic to Horses?

Species-specific symptom data not recorded; expected to present with colic, diarrhea, oral irritation, and potential systemic effects consistent with Euphorbia genus toxicity (Moderate)

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Toxicity Details

Humans

High

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

Cats

Moderate

Species-specific symptom data not recorded; expected to present with oral irritation, vomiting, diarrhea, and potential neurological or cardiac symptoms consistent with Euphorbia genus toxicity

Dogs

Moderate

Species-specific symptom data not recorded; expected to present with oral irritation, vomiting, diarrhea, and potential neurological or cardiac symptoms consistent with Euphorbia genus toxicity

Horses

Moderate

Species-specific symptom data not recorded; expected to present with colic, diarrhea, oral irritation, and potential systemic effects consistent with Euphorbia genus toxicity

Toxicity Snapshot

Toxic PartsAll plant parts that contain milky sap

Exposure RouteIngestion of plant material, eye contact with milky sap, dermal contact with sap, consumption of contaminated milk from exposed livestock

Toxic CompoundsIngenol esters (diterpene); Phorbol esters (diterpene); Euphol (triterpene); Other toxic terpenes

First Aid & Prevention

First 30 Minutes

• Rinse mouth thoroughly with clean water if ingested, do not induce vomiting unless directed by a medical/vet professional
• Flush eyes continuously with cool clean water for 15+ minutes holding eyelids open if sap contacts eyes
• Wash all affected skin areas with soap and cool water immediately, remove any remaining plant material from the exposure site

Contact Vet Immediately

• Any confirmed or suspected ingestion of the plant by pets, livestock, or children
• Development of symptoms like vomiting, bloody diarrhea, seizures, irregular heartbeat, or eye pain after exposure
• Signs of oral swelling, excessive salivation, or uncoordinated movement post-exposure

Prevention

• Remove petty spurge from areas accessible to children, pets, and grazing livestock
• Wear gloves and eye protection when handling the plant to avoid contact with toxic milky sap
• Do not feed hay or forage contaminated with Euphorbia peplus to livestock, as toxins remain active after drying

Treatment & Prognosis

• Perform decontamination including activated charcoal administration for recent ingestion as directed by a provider
• Provide symptomatic supportive care: fluid therapy for dehydration, anti-emetics for vomiting, pain management for colic
• Administer targeted care for ocular exposure including anti-inflammatory and antibiotic eye medications to prevent corneal damage
• Monitor cardiac function and kidney output to address signs of systemic toxicity

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Professional Toxicology

Scientific NameEuphorbia peplus L.

AliasesRadium weed、Cancer weed、Milkweed、Garten-Wolfsmilch (German)、Euphorbe péplus (French)、Euphorbe des jardins (French)、Esule ronde (French)、Euforbia minore (Italian)

Toxicity Grade

HumansHigh

CatsModerate

DogsModerate

HorsesModerate

Target Organs

Gastrointestinal tractEyesHeartKidneysNervous systemOral mucosa

Mechanism of Action

• Toxic terpenes irritate mucosal membranes, causing gastrointestinal erosion, bleeding, and oral inflammation

• Phorbol esters disrupt cellular signaling pathways, leading to cardiac arrhythmia, neurological dysfunction, and organ damage

• Toxins are excreted in the milk of exposed livestock, posing secondary exposure risk to humans and young animals

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Birds: Severely toxic (+++), ingestion can cause fatal systemic toxicity

Cattle: Toxic if ingested via contaminated dry forage; symptoms include colic, vomiting, bloody diarrhea, bloody urine, muscle tremors, dizziness; milk may be reddish or off-flavor, with toxins excreted in milk

Sheep: Toxic if fresh plant is ingested; symptoms include severe swelling and inflammation of oral mucosa, excessive salivation, diarrhea; recovery typically occurs after moving to uncontaminated pasture

Confusion Risk

The following plants look similar and may be confused:

Other spurge species Euphorbia spp.

Visually similar due to shared growth form, milky sap production, and small flower structure; all Euphorbia species contain similar toxic terpenes, so unidentified spurges should be assumed toxic

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Related Toxic Plants

Castor bean

Ricinus communis

Severe (extremely toxic, contains ricin)

Poinsettia

Euphorbia pulcherrima

Low (mild mucosal irritant)

Crown of thorns

Euphorbia milii

Moderate (causes gastrointestinal and dermal irritation)

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Data Sources

1. CliniTox (Universität Zürich)

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.