Panther Cap Toxic?

Updated 2026-03-06| 4 min read| 1,919 found this helpful

Amanita pantherina var. pantherina (DC. ex Fr.) Krombh.

Ibotenic acid in the mushroom converts to 5-6x more potent psychoactive muscimol when cooked or dried

Symptoms onset 30 minutes to 2 hours post-ingestion, including hallucinations that may persist for days

Atropine is contraindicated for treatment; physostigmine may be used for severe anticholinergic symptoms

FAQ

Is Panther Cap toxic to Humans?

Onset 30 minutes to 2 hours post-ingestion. Cholinergic symptoms include bradycardia, salivation, sweating, miosis; anticholinergic symptoms include tachycardia, dry warm skin, mydriasis. Additional symptoms: nausea, vomiting, fatigue, dizziness, heart arrhythmia, intestinal cramps, ileus, motor impairment, dyspnea, followed by hyperactivity, excitability, hallucinations, deep sleep. Fatalities in adults are extremely rare; psychosis may last days but resolves without sequelae. (High)

Is Panther Cap toxic to Cats?

Cholinergic presentation causes mydriasis, anticholinergic presentation causes miosis, plus general shared toxic symptoms listed for humans. (High)

Is Panther Cap toxic to Dogs?

Cholinergic presentation causes miosis, anticholinergic presentation causes mydriasis, plus general shared toxic symptoms listed for humans. (High)

Is Panther Cap toxic to Horses?

Specific documented symptoms are unavailable; expected effects include gastrointestinal distress, neurological impairment, and cardiovascular disturbances if ingested. (High)

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Toxicity Details

Humans

High

Cats

High

Cholinergic presentation causes mydriasis, anticholinergic presentation causes miosis, plus general shared toxic symptoms listed for humans.

Dogs

High

Cholinergic presentation causes miosis, anticholinergic presentation causes mydriasis, plus general shared toxic symptoms listed for humans.

Horses

High

Specific documented symptoms are unavailable; expected effects include gastrointestinal distress, neurological impairment, and cardiovascular disturbances if ingested.

Toxicity Snapshot

Toxic PartsAll parts of the fruiting body (cap, gills, stem, basal bulb) are toxic, even after cooking or drying.

Exposure RouteIngestion is the only confirmed toxic exposure route.

Toxic CompoundsIbotenic acid; Muscimol; Muscazone; Muscarine

First Aid & Prevention

First 30 Minutes

• Induce vomiting only if the exposed individual (human or pet) is conscious and ingestion occurred within the last 30 minutes
• Administer activated charcoal as soon as possible to absorb unprocessed toxins
• Do not give atropine, as it is contraindicated for this type of mushroom poisoning

Contact Vet Immediately

• Immediately if your pet ingested any amount of this mushroom, even if no symptoms are visible
• If you notice abnormal pupil size, excessive salivation, difficulty breathing, or unusual behavior in your pet after possible wild mushroom exposure
• If symptoms persist or worsen after initial first aid administration

Prevention

• Avoid foraging wild mushrooms unless you are a certified expert able to reliably distinguish toxic from edible species
• Keep small children and pets away from areas where wild Amanita mushrooms are known to grow
• Discard any wild mushrooms that cannot be identified with 100% certainty

Treatment & Prognosis

• Rapid decontamination via gastric emptying and activated charcoal administration as the first priority
• Administer physostigmine for severe anticholinergic symptoms under clinical supervision
• Provide supportive care for respiratory, cardiovascular, and neurological symptoms as needed

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Professional Toxicology

Scientific NameAmanita pantherina var. pantherina (DC. ex Fr.) Krombh.

AliasesPanther、False Blusher、Pantherpilz (German)、Brauner Knollenblätterpilz (German)、Panthère (French)、Crapaudin gris (French)、Amanite panthère (French)、Fausse golmelle (French)、Fausse golmotte (French)、Tignosa bigia (Italian)、Tignosa bruna (Italian)、Agarico panterino (Italian)

Toxicity Grade

HumansHigh

CatsHigh

DogsHigh

HorsesHigh

Target Organs

Central Nervous SystemCardiovascular SystemGastrointestinal TractRespiratory System

Mechanism of Action

• Muscimol is structurally similar to inhibitory neurotransmitter GABA, causing psychoactive and neurological effects

• Ibotenic acid decarboxylates to muscimol during cooking or drying, increasing toxicity by 5-6 times

• Muscarine content drives cholinergic symptoms in exposed individuals

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, goats: Ingestion may cause neurological impairment, severe gastrointestinal distress, and potential fatality in untreated severe cases.

Small mammals (rabbits, rodents): Small body size means even small ingestion amounts can trigger rapid, severe toxic effects including coma and death.

Confusion Risk

The following plants look similar and may be confused:

Blushing Wood Mushroom Amanita spissa

Edible, confused due to similar cap shape; lacks the characteristic white patchy scales on the Panther Cap's cap surface.

Blusher Amanita rubescens

Edible when cooked, confused due to similar size; bruises pale pink when damaged, while Panther Cap does not show pink discoloration.

Grey Spotted Amanita Amanita porphyria

Mildly toxic, has a distinct purplish-brown cap compared to the Panther Cap's typical brown cap with white spots.

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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.

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