Amanita muscaria effects usually begin 30 minutes to 2 hours after eating, peak in the first few hours and fade over 4 to 10 hours, sometimes lasting up to a day. People describe nausea, sweating and restlessness first, then a heavy, dreamlike state with distorted sizes, sounds and time, often followed by deep sleep. Confusion, agitation and muscle twitching are common. The intensity varies so much between mushrooms that the same person can have a mild evening one time and an emergency the next.
What the experience is described as
The descriptions below combine what poison centres record with what users report in published accounts. They describe acute effects, not lasting ones.
Body. Nausea, vomiting, stomach cramps, sweating, dizziness and unsteady walking. Twitching or jerking of muscles is frequent, and a feeling of heavy or weightless limbs.
Perception. Objects look bigger or smaller than they are, distances shift, sounds become loud or echo. Time stretches. Colours can appear with eyes closed. The UC San Diego researchers list weightlessness, oversensitivity to sight and sound, distortion of space and time, and coloured hallucinations among the reported effects (UCSD, 2024).
Mind. Many reports describe a state between waking and dreaming: lucid moments, then gaps. Euphoria and laughter occur, as do anxiety, confusion and disorientation. Memory of the hours afterwards is often patchy.
Sleep. Drowsiness is the most consistent feature. Many people fall into a deep sleep with vivid dreams. In stronger intoxications the sleep becomes reduced consciousness, from which the person cannot be properly woken.
A rough timeline
| Time after eating | What is often reported |
|---|---|
| 0.5 to 2 hours | nausea, sweating, restlessness, first dizziness |
| 1 to 3 hours | peak: dreamlike state, perception changes, twitching, alternating agitation and drowsiness |
| 3 to 8 hours | deep sleep or a drowsy, dazed state; confusion on waking |
| next day | tiredness, headache, a "hungover" feeling in many reports |
The ranges come from the reviews summarised on Wikipedia's muscimol page and from the Oregon poison centre series below, where all but one patient developed symptoms within 6 hours.
What poison centres record
Three sources give a picture of what goes wrong.
Oregon, 2002 to 2016. The Oregon Poison Center reviewed 34 confirmed cases of fly agaric and panther cap ingestion. Twelve people had eaten the mushroom after foraging, six recreationally and twelve by accident, several of them young children. Of the 25 people with symptoms, six recovered within 6 hours and fifteen within 24 hours. Five patients needed a breathing tube. Nobody died. The authors describe a mix of digestive upset, excitation and depression of the nervous system, alone or together (Moss and Hendrickson, Clinical Toxicology 2019).
United States, 2024. After people fell ill from Diamond Shruumz chocolate bars, cones and gummies, the FDA counted 180 illnesses and 73 hospital admissions in 34 states, with three deaths possibly linked. Symptoms included seizures, agitation, involuntary muscle contractions, loss of consciousness, confusion, sleepiness, nausea and vomiting, and abnormal heart rate and blood pressure. Muscimol was found in some products, along with several other substances (FDA).
Germany, 2025. The Federal Institute for Risk Assessment (BfR) warned about muscimol "fruit gums" sold online. German poison information centres had recorded several cases with reduced consciousness up to coma, confusion and agitation, disorientation, hallucinations, nausea and cardiovascular symptoms. The BfR singles out the risk that children eat them as sweets (BfR, 27 June 2025).
An analysis of social media comments by a research team in Warsaw adds the everyday side: headache, nausea, vomiting, stomach pain and drowsiness were the side effects people mentioned most (Ordak et al., Toxics 2023).
Deaths from fly agaric itself are rare in the modern medical record. The main dangers are choking on vomit while drowsy, falls and accidents while confused, deep unconsciousness, and a misidentified mushroom that turns out to be something far worse.
Who is most at risk
- Children, who may find a mushroom in a garden or eat "gummies" that look like sweets. In the Oregon series a three-year-old needed three days of intensive care.
- People combining it with alcohol, sleeping pills or other sedatives, which act on the same receptor family (see muscimol).
- People alone, who cannot call for help once they become drowsy or confused.
- People who are not sure what they ate, whether a wild mushroom or a product with an unclear label.
When to call for help straight away
Call emergency services or a poison centre if someone cannot be woken, breathes slowly or irregularly, has a seizure, is too agitated or confused to be kept safe, or keeps vomiting. Put a drowsy person on their side so they cannot choke. Tell the responders what was eaten and keep any leftovers or packaging.
- United States: Poison Help, 1-800-222-1222, or 911.
- United Kingdom: NHS 111, or 999 in an emergency.
- Netherlands and the rest of the EU: 112.
The trip reports show how these effects play out in practice. The legal status page covers where fly agaric and muscimol products are banned.
Updated