Yes. Amanita muscaria, also called fly agaric, can cause poisoning, including serious effects on the brain, breathing, and level of consciousness. The main compounds involved are ibotenic acid and muscimol, and after an unexpected ingestion, contact your local poison control center or emergency services.
The CDC report describes a Minnesota case involving Amanita muscaria var. guessowii: symptoms began about two to three hours after the patient ate mushrooms at home and included altered mental status, vomiting, diarrhea, sweating, heavy salivation, and swelling of the lips and tongue. The person needed airway protection and mechanical ventilation for four days. In everyday terms, this is not a predictable or casual mushroom experience.
What happens if you eat Amanita muscaria?
Poisoning can affect both the stomach and the central nervous system. A clinical case report describes symptoms beginning 30 minutes to two hours after ingestion, often shifting between excitation and depression of the central nervous system. That can mean agitation, hallucinations, confusion, sleepiness, loss of coordination, or reduced responsiveness.
| What may happen | What the reports describe |
|---|---|
| Early timing | The clinical case report says symptoms may begin within 30 minutes to two hours; other summaries give 30 to 90 minutes, while the CDC case began about two to three hours after eating mushrooms. |
| Brain and behavior | Hallucinations, agitation, altered mental status, seizures, coma, and alternating stimulation and depression have been reported. |
| Stomach and body symptoms | Vomiting, diarrhea, sweating, incontinence, heavy salivation, and swelling of the lips and tongue were reported in the CDC case. |
| Severe outcomes | Published cases include respiratory failure, intubation, coma, and hospitalization. |
Call 911 for emergency symptoms such as unresponsiveness, seizures, or trouble breathing. For any suspected ingestion, Poison Control can help you decide what to do next.
Why do ibotenic acid and muscimol affect the brain?
The CDC explains that ibotenic acid is structurally similar to glutamate and can produce central-nervous-system excitation, including hallucinations, agitation, or seizures. Muscimol is structurally similar to GABA and causes central-nervous-system depression. That contrast helps explain why an experience can swing from agitated or disoriented to heavily sedated.
A clinical report adds that ibotenic acid and muscimol are absorbed through the gastrointestinal tract and cross into the brain. It identifies muscimol as responsible for many symptoms, while the relationship between the two compounds may contribute to fluctuating central-nervous-system effects.
Do people trip on Amanita muscaria?
Some people seek Amanita muscaria for hallucinogenic effects, but the experience is not the same as psilocybin mushrooms. UC San Diego describes muscimol as acting differently from psilocybin and characterizes Amanita muscaria as a central-nervous-system depressant, similar in that respect to alcohol and benzodiazepines. For a closer comparison, see amanita muscaria vs psilocybin mushrooms.
A clinical summary by Erickson (2010), quoted by the Bay Area Mycological Society, reports that most cases recover within 12 to 24 hours, though some effects can last for days. Effects vary widely between people, so there is no reliable timeline for a single “high.”
How much Amanita muscaria is toxic?
The Emergency Physicians Monthly passage quoted by the Bay Area Mycological Society gives a toxic dose in adults of about 6 mg muscimol or 60 mg ibotenic acid, roughly the amount in one cap; another summary gives 30 to 60 mg ibotenic acid. These figures vary by mushroom, region, and season, and the evidence does not identify a safe amount. Do not use this as a guide to how much to eat.
The FDA recommends avoiding foods containing Amanita muscaria, its extracts, or constituents including muscimol and ibotenic acid. The agency concluded that these ingredients do not meet the safety standard for use in conventional food and may be harmful.
A number on a package does not answer what compounds are present or how a person will respond. If a product’s identity or ingredients are unclear, the practical choice is not to take it.
Are Amanita muscaria gummies different from eating the raw mushroom?
They are different products, but neither name alone tells you what is in a package. The FDA specifically includes Amanita muscaria, its extracts, muscimol, ibotenic acid, and muscarine in its warning about conventional foods, including products marketed as mushroom edibles or legal psychedelics. The agency says these ingredients are not authorized for use in conventional food.
That is why a gummy should not be treated as interchangeable with a raw mushroom, an extract, or another mushroom product. This site’s amanita products guide explains why a mushroom name is not enough to predict ingredients or effects. For a product-focused overview, see the amanita muscaria gummies guide.
Who faces the greatest risk?
Poisoning can occur especially in children, so any suspected ingestion in a child should go to Poison Control. The FDA’s food warning applies broadly to foods containing Amanita muscaria or its listed constituents. Keep wild mushrooms and mushroom edibles away from children. The clinical reports discussed here concern people, not dogs; for a pet concern, contact a veterinarian or Poison Control.
UC San Diego describes muscimol as a depressant similar to alcohol and benzodiazepines. The sources reviewed here do not quantify the risk of combining Amanita muscaria with alcohol or sedatives; UC San Diego describes muscimol as a depressant similar to alcohol and benzodiazepines, which is the only basis given for concern.
Can Amanita muscaria cause death or liver damage?
Serious poisoning can lead to coma and, in rare cases, death, according to a published clinical case report. The CDC’s Minnesota report involved Amanita muscaria var. guessowii and describes acute respiratory failure requiring mechanical ventilation. These are reasons to treat suspected ingestion as a poison-control question, not a wait-and-see experiment.
Published accounts summarized here do not study liver damage from Amanita muscaria. One clinical case reported normal liver enzymes. The CDC distinguishes its Amanita case from an outbreak involving a different mushroom, Amanita bisporigera, which contains amatoxin and is associated with liver failure. That distinction matters: the CDC case involving A. muscaria did not contain amatoxin. Do not assume that any Amanita mushroom has the same compounds or risk pattern.
What should you do after an unexpected ingestion?
- Contact your local Poison Control center after a suspected ingestion, even if symptoms seem mild at first.
- Call 911 for trouble breathing, a seizure, loss of consciousness, or a person who cannot be kept awake.
- Keep the package or any remaining mushroom available for identification, without tasting or handling it further.
- Do not rely on recipes, online preparation claims, or a previous experience as a safety check. The CDC notes that Amanita toxins might not be deactivated by cooking.
The FDA’s Amanita food alert is clear: the agency recommends avoiding foods containing these ingredients. If you are deciding whether to consume a mushroom or mushroom edible, that recommendation is the most useful line to act on.
By HealthDataConsortium.org Research Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
