Jacob's Ladder Toxic?

Updated 2026-03-06| 4 min read| 2,214 found this helpful

Jacob's Ladder is classified as non-toxic to common companion and livestock animals by the ASPCA.

No harmful toxic compounds have been isolated from this species for humans or domestic animals.

Accidental ingestion or skin contact typically does not cause adverse health effects for most individuals.

FAQ

Is Jacob's Ladder toxic to Humans?

No expected toxic symptoms; very rare mild gastrointestinal upset may occur in extremely sensitive individuals after large ingestion. (Non-toxic)

Is Jacob's Ladder toxic to Cats?

No documented toxic symptoms from ingestion, contact, or inhalation of plant material. (Non-toxic)

Is Jacob's Ladder toxic to Dogs?

No documented toxic symptoms from ingestion, contact, or inhalation of plant material. (Non-toxic)

Is Jacob's Ladder toxic to Horses?

No documented toxic symptoms from ingestion, contact, or inhalation of plant material. (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No expected toxic symptoms; very rare mild gastrointestinal upset may occur in extremely sensitive individuals after large ingestion.

Cats

Non-toxic

No documented toxic symptoms from ingestion, contact, or inhalation of plant material.

Dogs

Non-toxic

No documented toxic symptoms from ingestion, contact, or inhalation of plant material.

Horses

Non-toxic

No documented toxic symptoms from ingestion, contact, or inhalation of plant material.

Toxicity Snapshot

Toxic PartsNo parts of this plant are considered toxic to humans or common domestic animals.

Exposure RouteNo toxic exposure routes identified; ingestion, skin contact, and pollen inhalation pose no significant health risk.

Toxic CompoundsNo known toxic compounds

First Aid & Prevention

First 30 Minutes

• Rinse mouth with clean water if large amounts of plant material are ingested.
• Monitor for rare mild digestive discomfort for 2-4 hours post-exposure.
• Provide small amounts of water if mild throat irritation occurs after ingestion.

Contact Vet Immediately

• Persistent vomiting, diarrhea, or lethargy lasting more than 6 hours after ingestion.
• Signs of allergic reaction including swelling, hives, or difficulty breathing.

Prevention

• No specific safety measures are required for this non-toxic species.
• Follow general best practice of keeping all houseplants out of reach of unsupervised pets.

Treatment & Prognosis

• Only supportive care is needed if rare mild adverse symptoms appear.
• No targeted antidote is required as no toxic agents are present in the plant.

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Professional Toxicology

Scientific NameSmilax herbacea

AliasesCarrion Flower

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No organs are at risk of toxic damage from exposure to this plant species.

Mechanism of Action

• No toxic mechanism identified, as the plant produces no known harmful metabolites that affect mammalian biological functions.

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Rabbit: No known toxicity; small amounts are considered safe as part of a varied forage diet.

Guinea Pig: No adverse effects reported from incidental ingestion of plant material.

Cattle, Sheep, Goat: No toxic effects documented; considered safe for accidental grazing in pastures.

Confusion Risk

The following plants look similar and may be confused:

Garden Jacob's Ladder Polemonium caeruleum

Both share the common name Jacob's Ladder; Polemonium has feathery pinnate compound leaves, while Smilax herbacea has simple heart-shaped leaves and carrion-scented green flowers.

Poison Hemlock Conium maculatum

Young Smilax herbacea shoots may be mistaken for edible hemlock shoots; poison hemlock has distinct purple-spotted stems and lacy fern-like leaves, unlike the unspotted smooth stems of Smilax herbacea.

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Related Toxic Plants

Easter Lily

Lilium longiflorum

Severe (extremely toxic to cats, causes fatal acute kidney failure even in small doses)

Tiger Lily

Lilium lancifolium

Severe (toxic to cats, ingestion of any plant part can lead to life-threatening kidney injury)

Autumn Crocus

Colchicum autumnale

High (toxic to all mammals, causes organ failure and bone marrow suppression if ingested)

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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.