Red staining inocybe Toxic?

Updated 2026-03-06| 3 min read| 1,173 found this helpful
Inocybe erubescens A.Blytt (syn. Inocybe patouillardii Bres.)
1

Contains 333-1100 times more muscarine than fly agaric; muscarine is heat-stable and not broken down by digestive enzymes

2

Poisoning symptoms appear 15 to 60 minutes after ingestion, including classic cholinergic signs like salivation, lacrimation, and breathing distress

3

Atropine is the first-line antidote for life-threatening symptoms, with supportive symptomatic care as standard treatment

FAQ

Is Red staining inocybe toxic to Humans?

Onset 15-60 minutes post-ingestion: salivation, lacrimation, vomiting, diarrhea, abdominal pain, apathy, constricted pupils, bradycardia or secondary tachycardia from hypovolemia, excessive bronchial secretions, rapid breathing, hypothermia (High)

Is Red staining inocybe toxic to Cats?

No species-specific symptom data available; expected to exhibit cholinergic poisoning signs including salivation, vomiting, and breathing distress if ingested (High)

Is Red staining inocybe toxic to Dogs?

No species-specific symptom data available; expected to exhibit cholinergic poisoning signs including salivation, vomiting, and breathing distress if ingested (High)

Is Red staining inocybe toxic to Horses?

No species-specific symptom data available; expected to exhibit cholinergic poisoning signs including salivation, vomiting, and breathing distress if ingested (High)

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Toxicity Details

Humans
High

Onset 15-60 minutes post-ingestion: salivation, lacrimation, vomiting, diarrhea, abdominal pain, apathy, constricted pupils, bradycardia or secondary tachycardia from hypovolemia, excessive bronchial secretions, rapid breathing, hypothermia

Cats
High

No species-specific symptom data available; expected to exhibit cholinergic poisoning signs including salivation, vomiting, and breathing distress if ingested

Dogs
High

No species-specific symptom data available; expected to exhibit cholinergic poisoning signs including salivation, vomiting, and breathing distress if ingested

Horses
High

No species-specific symptom data available; expected to exhibit cholinergic poisoning signs including salivation, vomiting, and breathing distress if ingested

Toxicity Snapshot

Toxic PartsAll parts of the fruiting body, fresh or cooked, are toxic as muscarine is heat-stable and not destroyed by cooking
Exposure RouteIngestion is the only confirmed toxic exposure route; no dermal or inhalation toxicity has been documented
Toxic CompoundsMuscarine (quaternary amine, 0.1-0.33% of dry weight, 333-1100x higher concentration than in fly agaric)

First Aid & Prevention

First 30 Minutes

  • • Induce vomiting if the affected individual is conscious and ingestion occurred within the last 1 hour
  • • Collect any remaining mushroom fragments for formal mycological identification to guide targeted treatment
  • • Monitor vital signs (heart rate, breathing rate, consciousness level) closely while seeking emergency care

Contact Vet Immediately

  • • Confirmed or suspected ingestion of any Inocybe species, even if no symptoms are yet visible
  • • Appearance of cholinergic symptoms including excessive salivation, lacrimation, difficulty breathing, or persistent vomiting after wild mushroom exposure
  • • Signs of dehydration, lethargy, abnormal heart rate, or reduced responsiveness in animals post-ingestion

Prevention

  • • Never consume wild foraged mushrooms unless verified as edible by a certified, experienced mycologist
  • • Restrict pet access to yards or natural areas where unidentified wild mushrooms grow to avoid accidental consumption
  • • Learn to identify the characteristic red bruising reaction of this species to avoid confusion with edible lookalikes

Treatment & Prognosis

  • • Administer general supportive care including intravenous fluid therapy to correct hypovolemia and electrolyte imbalances from vomiting and diarrhea
  • • Give atropine for life-threatening cholinergic symptoms, continuing administration until respiratory secretions are fully suppressed
  • • Continuously monitor cardiac and respiratory function until all clinical signs of poisoning have fully resolved
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Professional Toxicology

Scientific NameInocybe erubescens A.Blytt (syn. Inocybe patouillardii Bres.)
AliasesBrick-red fibrecap、May fibrecap、Common fibrecap、False mousseron、Inocybe de patouillard
Toxicity Grade
HumansHigh
CatsHigh
DogsHigh
HorsesHigh
Target Organs
Gastrointestinal tractRespiratory systemCardiovascular systemPeripheral nervous system
Mechanism of Action

• Muscarine binds to peripheral muscarinic acetylcholine receptors, causing overstimulation of the parasympathetic nervous system

• Muscarine is thermostable, not degraded by digestive enzymes, poorly absorbed in the gastrointestinal tract, and unable to cross the blood-brain barrier

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

All mammalian species: Presumed highly toxic if ingested, expected to develop cholinergic poisoning symptoms consistent with muscarine exposure, including salivation, vomiting, diarrhea, and respiratory distress
Confusion Risk

The following plants look similar and may be confused:

Field mushrooms (most species except yellow-staining varieties) Psalliota spp. (Agaricus spp.)
Most are edible; red staining inocybe shows a red bruising reaction when damaged, while edible Agaricus species typically stain pink or brown with age or bruising
St. George's mushroom Calocybe gambosa
Edible spring mushroom; it has a uniform creamy white cap and flesh with no red bruising, unlike red staining inocybe
Fairy ring mushroom Marasmius oreades
Edible small mushroom; it has a tan cap, sweet almond-like scent, and no red bruising reaction when handled
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Related Toxic Plants

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Straight-stalked fibrecap
Inocybe fastigiata
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White fibrecap
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Data Sources

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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