Opium Poppy Toxic?

Updated 2026-03-06| 4 min read| 2,377 found this helpful

All parts of the opium poppy are toxic, particularly half-ripe seed pods that have the highest concentration of opium alkaloids.

Primary toxic compounds are opioid alkaloids including morphine, codeine, and thebaine, which impact nervous and respiratory function.

Prompt decontamination and respiratory support are required for treatment, with naloxone used to reverse opioid toxicity effects.

FAQ

Is Opium Poppy toxic to Humans?

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures. (High)

Is Opium Poppy toxic to Cats?

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures. (Low)

Is Opium Poppy toxic to Dogs?

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures. (Low)

Is Opium Poppy toxic to Horses?

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures. (Low)

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Toxicity Details

Humans

High

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures.

Cats

Low

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures.

Dogs

Low

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures.

Horses

Low

No species-specific clinical data available; exposure may cause opioid-related effects including drowsiness, disorientation, respiratory depression, gastrointestinal distress, and seizures.

Toxicity Snapshot

Toxic PartsWhole plant (latex), especially half-ripe seed pods (1kg of opium requires latex from 20,000 poppy pods)

Exposure RouteIngestion of plant material, contact with fresh latex, consumption of products made from unprocessed poppy parts

Toxic CompoundsOpium alkaloids; Morphine; Papaverine; Thebaine; Codeine; Narcotine; Noscapine; Narcein; Protopine

First Aid & Prevention

First 30 Minutes

• If ingested, induce vomiting only if the affected individual is alert and not seizing, within 1 hour of exposure.
• Remove all remaining plant material from the mouth and surrounding area to prevent further ingestion.
• Collect a sample of the ingested plant for accurate identification to guide appropriate treatment.

Contact Vet Immediately

• Any confirmed or suspected ingestion of opium poppy by humans, companion animals, or livestock.
• Presence of symptoms including disorientation, seizures, respiratory distress, or excessive drowsiness after exposure.
• If you are uncertain if the ingested plant material is opium poppy or a related lookalike species.

Prevention

• Do not grow opium poppy in areas accessible to children, pets, or foraging livestock.
• Properly dispose of all opium poppy plant waste to prevent accidental ingestion by animals.
• Learn to identify opium poppy to avoid confusion with non-toxic related ornamental poppy species.

Treatment & Prognosis

• Perform decontamination via induced vomiting, activated charcoal administration, and gastric lavage as appropriate for the exposed species.
• Provide symptomatic care including respiratory support to maintain normal breathing function and open airways.
• Administer naloxone as directed by a medical professional or veterinarian to reverse opioid toxicity effects.

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Professional Toxicology

Scientific NamePapaver somniferum L.

AliasesGarden poppy、White poppy

Toxicity Grade

HumansHigh

CatsLow

DogsLow

HorsesLow

Target Organs

Central nervous systemRespiratory systemGastrointestinal tractKidneys

Mechanism of Action

• Opium alkaloids bind to opioid receptors in the central nervous system, depressing respiratory function, altering neurological activity, and impairing gastrointestinal motility.

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Ingestion causes symptoms including restlessness progressing to mania, constant movement, teeth grinding, seizures, constipation or diarrhea, anuria (lack of urine production), salivation, hypothermia, rapid breathing, and deep sleep; fatalities are rare.

Confusion Risk

The following plants look similar and may be confused:

Common poppy Papaver rhoeas

Visually similar due to shared poppy flower morphology; common poppy has far lower alkaloid content, distinguishable by smaller, deeply lobed leaves and bright red flowers with black centers.

Oriental poppy Papaver orientale

Similar large showy flower structure; ornamental oriental poppy has negligible opium alkaloid content, identifiable by hairy stems/leaves and typically orange, pink, or red blooms.

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Related Toxic Plants

California poppy

Eschscholzia californica

Low toxicity

Bloodroot

Sanguinaria canadensis

Moderate toxicity

Greater celandine

Chelidonium majus

Moderate to high toxicity

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Data Sources

1. CliniTox (Universität Zürich)

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