Common Greenbrier Toxic?

Updated 2026-03-06| 5 min read| 4,295 found this helpful

Common Greenbrier is classified as non-toxic to cats, dogs, and horses per available toxicology data

No severe adverse effects are expected from incidental ingestion of this plant by the listed species

Extreme overconsumption may cause mild, transient gastrointestinal upset in sensitive individuals of any species

FAQ

Is Common Greenbrier toxic to Humans?

No confirmed severe toxicity; excessive ingestion may cause mild, transient stomach discomfort, nausea, or loose stools in sensitive people (Non-toxic)

Is Common Greenbrier toxic to Cats?

No documented toxic effects; very large intake may rarely cause mild temporary digestive upset (Non-toxic)

Is Common Greenbrier toxic to Dogs?

No documented toxic effects; very large intake may rarely cause mild temporary digestive upset (Non-toxic)

Is Common Greenbrier toxic to Horses?

No documented toxic effects; very large grazing intake may rarely cause mild temporary gastrointestinal upset (Non-toxic)

Not sure which plant? Snap a photo to ID in 1 secondGet App

Toxicity Details

Humans

Non-toxic

No confirmed severe toxicity; excessive ingestion may cause mild, transient stomach discomfort, nausea, or loose stools in sensitive people

Cats

Non-toxic

No documented toxic effects; very large intake may rarely cause mild temporary digestive upset

Dogs

Non-toxic

No documented toxic effects; very large intake may rarely cause mild temporary digestive upset

Horses

Non-toxic

No documented toxic effects; very large grazing intake may rarely cause mild temporary gastrointestinal upset

Toxicity Snapshot

Toxic PartsNo plant parts are known to have significant toxicity to cats, dogs, or horses; all parts are low-risk for these species

Exposure RoutePrimary exposure route is ingestion; thorn contact may cause minor mechanical skin irritation but no toxic reaction

Toxic CompoundsLow-concentration saponins; Tannins; Flavonoids

First Aid & Prevention

First 30 Minutes

• Rinse mouth with clean water to remove remaining plant debris
• Monitor for mild gastrointestinal symptoms (bloating, loose stools) for 2-4 hours post-exposure
• Offer small sips of water to ease mild nausea if it occurs

Contact Vet Immediately

• If your animal shows persistent vomiting, diarrhea, or lethargy lasting over 6 hours after ingestion
• If your pet/animal consumed extremely large quantities alongside other unidentified vegetation
• If you cannot confirm the plant identity or suspect co-ingestion of other toxic plants

Prevention

• Remove thorny stems from pet-accessible areas to prevent mechanical puncture injuries
• Always properly identify foraged plants before offering them to livestock or companion animals
• Keep a local toxic/non-toxic plant photo guide on hand for quick identity verification

Treatment & Prognosis

• Provide supportive care for mild digestive symptoms as recommended by a healthcare or veterinary provider
• Clean and apply antiseptic to any thorn puncture wounds to prevent secondary bacterial infection
• No specific antidote is required as no severe toxic effects are linked to this plant

Emergency? Open PlantFun for real-time AI guidanceGet App

Professional Toxicology

Scientific NameSmilax rotundifolia

AliasesCatbrier、Horsebrier

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

Gastrointestinal tract (only mild, temporary irritation in cases of extreme overconsumption, no permanent damage)

Mechanism of Action

• No toxic mechanisms are documented for cats, dogs, or horses; naturally occurring compounds are present in concentrations too low to cause harm

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Non-toxic; no confirmed adverse effects from normal grazing, large intake may cause mild temporary digestive upset

Sheep: Non-toxic; no documented negative health effects from regular browsing of this plant

Goats: Non-toxic; goats commonly browse this plant with no observed adverse reactions

Confusion Risk

The following plants look similar and may be confused:

Cat Greenbrier Smilax glauca

Visually similar due to shared vining growth, round leaves, and thorns; key difference is S. glauca has distinct waxy blue-gray leaf undersides, while S. rotundifolia has green undersides

Saw Greenbrier Smilax bona-nox

Shares thorny vining growth habit; key difference is S. bona-nox has irregularly toothed leaf edges, compared to the smooth rounded leaf edges of S. rotundifolia

Use PlantFun to scan and avoid misidentificationGet App

Related Toxic Plants

Lily of the Valley

Convallaria majalis

Severe, highly toxic to humans, cats, dogs, and horses, can cause fatal cardiac arrhythmia even in small doses

Easter Lily

Lilium longiflorum

Severe, extremely toxic to cats, small ingestions can lead to fatal acute kidney failure

Death Camas

Zigadenus elegans

High/Severe, toxic to all mammals, can cause fatal organ failure if ingested

Download PlantFun App

Identify, grow and care for plants effectively!

Instant Plant ID

Take a photo to quickly identify plants.

Smart Care Reminders

Generate watering and care schedules.

Toxicity & Disease Diagnosis

Identify toxic plants and pests with treatment advice.

Data Sources

1. ASPCA Animal Poison Control

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