Indian Hemp Toxic?

Updated 2026-03-06| 3 min read| 1,397 found this helpful

This plant is confirmed toxic to cats, dogs, and horses per official ASPCA data

Cardenolides, a class of cardiac glycosides, are its primary toxic component

Exposure typically causes bloody diarrhea, slow heart rate, and generalized weakness in affected animals

FAQ

Is Indian Hemp toxic to Humans?

No confirmed human toxicity data is publicly available; seek emergency medical care if accidental large-volume ingestion occurs (Low)

Is Indian Hemp toxic to Cats?

Diarrhea (potentially bloody), slow heart rate, generalized weakness (Moderate)

Is Indian Hemp toxic to Dogs?

Diarrhea (potentially bloody), slow heart rate, generalized weakness (Moderate)

Is Indian Hemp toxic to Horses?

Diarrhea (potentially bloody), slow heart rate, generalized weakness (Moderate)

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Toxicity Details

Humans

Low

No confirmed human toxicity data is publicly available; seek emergency medical care if accidental large-volume ingestion occurs

Cats

Moderate

Diarrhea (potentially bloody), slow heart rate, generalized weakness

Dogs

Moderate

Diarrhea (potentially bloody), slow heart rate, generalized weakness

Horses

Moderate

Diarrhea (potentially bloody), slow heart rate, generalized weakness

Toxicity Snapshot

Toxic PartsAll plant parts are considered potentially toxic, with roots containing the highest concentration of cardenolide compounds

Exposure RouteIngestion is the primary confirmed exposure route; skin contact may cause mild localized irritation in sensitive individuals

Toxic CompoundsCardenolides

First Aid & Prevention

First 30 Minutes

• If ingestion is witnessed, immediately remove remaining plant material from the exposed animal's mouth and rinse thoroughly with clean water
• Do not induce vomiting unless explicitly instructed to do so by a licensed veterinarian or poison control professional
• Collect a sample of the ingested plant to support fast, accurate identification for treatment planning

Contact Vet Immediately

• If your cat, dog, or horse has ingested any quantity of this plant, even if no symptoms are visible yet
• If any listed symptoms (bloody diarrhea, slow heart rate, weakness) appear after potential exposure
• If you are unsure if the ingested plant is Indian Hemp or another toxic Apocynaceae species

Prevention

• Remove all Indian Hemp plants from areas accessible to pets, grazing livestock, and young children
• Learn to identify this species to avoid accidental exposure during outdoor hikes or foraging activities with animals
• Never feed unknown wild plants to pets or livestock, even if they appear palatable

Treatment & Prognosis

• Veterinarians may administer activated charcoal to bind unabsorbed toxic compounds in the gastrointestinal tract
• Supportive care including IV fluids and continuous cardiac monitoring will be provided to manage dehydration and abnormal heart rhythm
• Symptomatic treatment for diarrhea and weakness will be delivered as needed based on the patient's clinical presentation

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Professional Toxicology

Scientific NameApocynum androsaemifolium

AliasesDogbane Hemp、Bitter Root

Toxicity Grade

HumansLow

CatsModerate

DogsModerate

HorsesModerate

Target Organs

HeartGastrointestinal tract

Mechanism of Action

• Cardenolides inhibit sodium-potassium ATPase pumps in cardiac cell membranes, disrupting normal heart rhythm and contractility

• Toxic compounds also irritate the gastrointestinal mucosal lining, leading to inflammation, diarrhea, and potential bleeding

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Moderate toxicity risk; ingestion may cause identical cardiac and gastrointestinal symptoms as those observed in horses, with risk of fatal complications in large exposures

Sheep and Goats: Moderate toxicity risk; avoidance of the plant is recommended for all grazing livestock operations

Small companion mammals (rabbits, guinea pigs): High precautionary risk; ingestion is expected to cause severe gastrointestinal distress and cardiac abnormalities

Confusion Risk

The following plants look similar and may be confused:

Common Milkweed Asclepias syriaca

Visually similar due to upright growth habit and clustered small flowers; key difference is Common Milkweed exudes thick milky latex when stems are broken, while Indian Hemp produces clear sap

Hemp Dogbane Apocynum cannabinum

Closely related and nearly visually identical; key difference is A. cannabinum has small greenish-white flowers, while A. androsaemifolium has larger pink-tinged bell-shaped flowers

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Related Toxic Plants

Oleander

Nerium oleander

Severe toxicity; ingestion of even small amounts can be fatal to humans and all animal species

Desert Rose

Adenium obesum

High toxicity; contains potent cardiac glycosides that trigger life-threatening arrhythmia

Tropical Milkweed

Asclepias curassavica

Moderate toxicity; causes gastrointestinal and cardiac symptoms in most pets and livestock when ingested in large volumes

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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.