Herb Paris Toxic?

Updated 2026-03-06| 5 min read| 4,548 found this helpful
Paris quadrifolia L.
1

All parts of Herb Paris are toxic, with the highest saponin concentrations found in berries and roots

2

Ingestion can cause vomiting, diarrhea, pupil constriction, and central nervous system effects at high doses

3

Its berries are easily confused with edible bilberries, creating high accidental ingestion risk for foragers

FAQ

Is Herb Paris toxic to Humans?

Vomiting, diarrhea, miosis (pupil constriction), central nervous system impairment after consumption of large quantities (Moderate)

Is Herb Paris toxic to Cats?

No specific feline toxicity data is documented, but ingestion is strongly discouraged due to confirmed toxicity in other mammals (Moderate)

Is Herb Paris toxic to Dogs?

Paralysis after ingestion of berries (Moderate)

Is Herb Paris toxic to Horses?

Muscle twitching, agitation, tachycardia (elevated heart rate) after ingestion of large quantities (Moderate)

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Toxicity Details

Humans
Moderate

Vomiting, diarrhea, miosis (pupil constriction), central nervous system impairment after consumption of large quantities

Cats
Moderate

No specific feline toxicity data is documented, but ingestion is strongly discouraged due to confirmed toxicity in other mammals

Dogs
Moderate

Paralysis after ingestion of berries

Horses
Moderate

Muscle twitching, agitation, tachycardia (elevated heart rate) after ingestion of large quantities

Toxicity Snapshot

Toxic PartsAll parts of the plant, with highest toxin levels in the berries and roots
Exposure RouteIngestion is the only confirmed toxic exposure route; casual skin contact does not typically cause adverse effects
Toxic CompoundsParidin; Paristyphnin; Steroidal saponins

First Aid & Prevention

First 30 Minutes

  • • Induce vomiting only if ingestion occurred <10 minutes prior and the affected individual is fully conscious and alert
  • • Withhold all food and liquids unless explicitly directed by a medical or veterinary professional
  • • Collect a sample of the ingested plant to confirm identity and guide targeted treatment

Contact Vet Immediately

  • • Any confirmed or suspected ingestion of any part of Herb Paris, especially berries or roots
  • • Onset of symptoms including vomiting, diarrhea, abnormal pupil size, muscle twitches, or altered consciousness
  • • Ingestion by vulnerable groups including children, pets, or free-ranging livestock

Prevention

  • • Learn to distinguish Herb Paris from edible bilberries to avoid accidental foraging ingestion
  • • Remove plants from areas accessible to pets, children, and livestock to prevent unintended exposure
  • • Never consume wild foraged plants unless identification is 100% confirmed by a qualified expert

Treatment & Prognosis

  • • Administer activated charcoal as soon as possible to perform gastrointestinal decontamination
  • • Provide symptomatic supportive care including anti-emetics, fluid therapy, and cardiac monitoring as needed
  • • Monitor central nervous system function and cardiac activity for 24-48 hours post-ingestion to detect delayed effects
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Professional Toxicology

Scientific NameParis quadrifolia L.
AliasesOne berry、Four-leaved one-berry、Fox's eye、Wolf berry、Sow's eye、Four-leaved parisette、Wolf-strangler、Paris herb、Fox grape、Cross herb
Toxicity Grade
HumansModerate
CatsModerate
DogsModerate
HorsesModerate
Target Organs
Gastrointestinal tractCentral nervous systemCardiovascular systemOcular system
Mechanism of Action

• Steroidal saponins irritate gastrointestinal mucosa, causing vomiting and diarrhea

• Systemic saponin exposure impairs central nervous system function and disrupts cardiac rhythm at high doses

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Poultry: Ingestion of Herb Paris berries causes poisoning and potential mortality
Confusion Risk

The following plants look similar and may be confused:

Bilberry Vaccinium myrtillus
Herb Paris berries are visually similar to edible bilberries; bilberries grow on low, multi-stemmed shrubs with small oval leaves, while Herb Paris has a single stem with a whorl of 4 large leaves and one berry atop the stem
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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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