Peace Lily Toxic?

Updated 2026-03-06| 4 min read| 3,984 found this helpful
Peace Lily
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Peace Lily is confirmed toxic to cats and dogs per ASPCA toxicology data

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Its primary toxic compound is insoluble calcium oxalate crystals

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Ingestion typically causes oral irritation, digestive upset, and potential difficulty swallowing

FAQ

Is Peace Lily toxic to Humans?

Oral burning and irritation, excessive salivation, stomach pain, vomiting, difficulty swallowing (Low)

Is Peace Lily toxic to Cats?

Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing (Moderate)

Is Peace Lily toxic to Dogs?

Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing (Moderate)

Is Peace Lily toxic to Horses?

Toxicity risk is currently unknown, no confirmed clinical symptom data available (Unknown)

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Toxicity Details

Humans
Low

Oral burning and irritation, excessive salivation, stomach pain, vomiting, difficulty swallowing

Cats
Moderate

Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing

Dogs
Moderate

Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing

Horses
Unknown

Toxicity risk is currently unknown, no confirmed clinical symptom data available

Toxicity Snapshot

Toxic PartsAll plant parts including leaves, stems, flowers, sap, and roots
Exposure RouteIngestion of plant material, direct contact of plant sap with oral mucosa, or contact with broken skin
Toxic CompoundsInsoluble calcium oxalates

First Aid & Prevention

First 30 Minutes

  • • Immediately remove any remaining plant pieces from the exposed subject's mouth
  • • Rinse the mouth thoroughly with cool, clean water to flush out remaining oxalate crystals
  • • Offer small sips of cool water if the subject is alert and able to swallow safely
  • • Monitor closely for signs of swelling, difficulty breathing, or severe pain

Contact Vet Immediately

  • • The pet experiences difficulty breathing or visible swelling of the mouth/throat
  • • Vomiting is persistent, contains blood, or is accompanied by lethargy
  • • The pet cannot swallow or shows signs of extreme distress or pain

Prevention

  • • Place Peace Lily plants in areas completely inaccessible to cats, dogs, and small children
  • • Wear disposable gloves when pruning or handling the plant to avoid skin irritation from sap
  • • Dispose of trimmed plant clippings immediately to prevent accidental ingestion

Treatment & Prognosis

  • • Supportive care including oral rinses and fluid administration to manage dehydration from drooling or vomiting
  • • Prescription anti-inflammatory and pain relief medications to reduce swelling and discomfort
  • • Emergency airway management in rare severe cases where throat swelling impairs breathing
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Professional Toxicology

Scientific NameSpathiphyllum
AliasesMauna Loa Peace Lily
Toxicity Grade
HumansLow
CatsModerate
DogsModerate
HorsesUnknown
Target Organs
Oral mucosaTongueLipsThroatUpper gastrointestinal tract
Mechanism of Action

• Insoluble calcium oxalate crystals have sharp, needle-like structures that penetrate soft mucosal tissue in the mouth, throat, and gastrointestinal tract upon contact or ingestion, causing immediate pain, inflammation, and irritation

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Horse: Toxicity risk is currently unconfirmed; no formal poisoning cases are recorded in available veterinary toxicology databases.
Small companion mammals (rabbits, guinea pigs, hamsters): Expected to be toxic; ingestion may cause oral irritation, drooling, and digestive upset.
Pet birds: Limited data available, but ingestion is not recommended as it may cause oral and gastrointestinal irritation.
Confusion Risk

The following plants look similar and may be confused:

Calla Lily Zantedeschia aethiopica
Both have glossy green foliage and white spathe flowers; Calla Lily has a wider, cup-shaped spathe, while Peace Lily has a narrower, elongated spathe. Both are toxic members of the Araceae family.
Flamingo Lily Anthurium andraeanum
Both share the characteristic spathe and spadix flower structure and glossy leaves; Flamingo Lily typically has bright red/pink spathes, while Peace Lily spathes are white, and both contain toxic calcium oxalates.
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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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