With mushrooms you do not choose the dose — you inherit it
Warning signs
- Vomiting that will not stop, or stomach pain hours after the effects should have faded — the classic pattern of a poisonous lookalike is a delay
- Yellowing skin or eyes, or dark urine, in the days afterwards
- A seizure, or twitching that will not stop
- Panic or a sense of unreality severe enough that the person cannot be kept safe
If it goes wrong
- If there is any chance the mushroom was misidentified, treat it as a poisoning and go to hospital — do not wait to feel worse. Take a sample of what was eaten with you.
- Call emergency services and say what was taken, how much, and when.
- For a panic reaction: a quiet, dimly lit place, someone familiar, no crowd, and no arguing with the content of the experience.
- Stay with the person. Impaired judgement of time and distance is listed among the effects; that is not a state to be alone in.
Legal framework
| ES | Consumption or unlawful possession of controlled substances in public places, roads, public establishments or public transport — even when not intended for trafficking — is a serious administrative offence under the citizen-security law. Trafficking is a separate criminal matter. This describes the public-place case only; it is not a statement that possession is lawful. as of 2026-07-18 · Ley Orgánica 4/2015, de protección de la seguridad ciudadana, art. 36 (BOE-A-2015-3442) |
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| NL | Psilocin and psilocybin are Schedule I substances under the 1971 UN Convention, but the EU agency records that the control of the MUSHROOMS containing them is interpreted in many different ways across Europe: some countries list the mushrooms themselves as controlled and forbid their sale or possession, others do not. The Netherlands is the well-known example of a market that grew inside that gap. Which means: the status of the molecule and the status of the object are not the same question, and only your own country's current text answers the second. as of 2026-07-18 · European Union Drugs Agency (EUDA/EMCDDA), hallucinogenic mushrooms drug profile — control status |
This describes the law as of the date shown; it is not legal advice. The law changes and differs by country — checking yours is your responsibility.
Dangerous interactions
picking wild mushrooms yourself life-threatening
The EU agency states plainly that in the wild these mushrooms are easily mistaken for any number of non-psychoactive, inedible, or poisonous ones. This is the risk that separates mushrooms from every other psychedelic: the failure mode is not a bad experience, it is having eaten a different organism entirely, and some of the lookalikes damage the liver rather than the evening.
European Union Drugs Agency (EUDA/EMCDDA), hallucinogenic mushrooms drug profile
an existing seizure disorder serious
A documented case using implanted recording hardware found that a 3.6 g dose produced 32 long episodes of prolonged epileptiform activity in a man with refractory frontal epilepsy, while a 1.5 g dose did not change his baseline seizure frequency. It is one patient, so it proves nothing about you — but it is the rare instance where the effect on the brain was measured rather than reported, and the dose dependence was stark.
Psychedelics, epilepsy, and seizures: a review (citing Blond and Schindler, 2023)
What the sources report
| oral | The EU drugs agency reports recreational doses of 1–5 grams of dry mushrooms, explicitly qualified as depending on the species and the individual strength of the specimens. For fresh mushrooms the figures are roughly ten times higher, 10–50 grams. Effects usually occur within 30 minutes of ingestion. 4 to 6 hours — roughly half an LSD experience. European Union Drugs Agency (EUDA/EMCDDA), hallucinogenic mushrooms drug profile |
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Every dose figure you will read for mushrooms comes with a qualifier that people skip. The EU agency gives 1 to 5 grams of dried material — and then says, in the same breath, that it depends on the species and on the individual strength of the specimens.
Read that again. The number is not a property of the dose. It is a property of the organism you happen to be holding.
Why this is a different problem from a pill
A blotter of LSD carries a quantity someone measured, however badly. A mushroom carries whatever it grew. Two caps from the same bag, the same species, the same flush, are not required to agree with each other — and nothing you can do at the kitchen table will tell you which one you have.
Weight makes it worse, not better: fresh material runs about ten times heavier for the same effect, 10 to 50 grams, so a scale answers a question you were not actually asking.
The risk that has nothing to do with the experience
Here is the sentence from the agency that should be printed on every forum post: in the wild, these mushrooms are easily mistaken for any number of non-psychoactive, inedible, or poisonous mushrooms.
That is not a bad-trip risk. It is a different-organism risk. And the lookalikes that matter do not announce themselves — the dangerous pattern is a delay: hours of feeling fine, or of feeling merely unwell, while something works on the liver. If there is any doubt at all about what was eaten, that is a hospital question, not a wait-and-see question.
The legal answer is two questions pretending to be one
Psilocin and psilocybin are Schedule I under the 1971 Convention. Straightforward. But the agency also records that the control of the *mushrooms* containing them is interpreted in many different ways across Europe: some countries name the mushrooms themselves and forbid sale or possession, others do not.
So "are mushrooms legal here" is really two questions — the molecule and the object — and only the current text where you live answers the second. Anyone who tells you the answer in one word, either way, has not read their own country's law.
The honest summary
With most substances the danger is that you took too much. With this one, the first danger is that you do not know what you took, and the second is that nobody can tell you how strong it was.
Enter the Void
Warning: this simulation animates colour, blur and scale slowly and continuously. It does not blink or flash, and never exceeds three changes per second — but if you have photosensitive epilepsy, or have had seizures triggered by visual stimuli, do not start it. The text description below says the same thing.
What this simulation does NOT reproduce: Nothing here blinks or flashes. Flashing is the photosensitive-epilepsy trigger, and given that this page documents a measured case of seizure activity at a high dose, reproducing a trigger would be an unusually poor joke. Every change is slow and continuous.
Sources
- European Union Drugs Agency (EUDA/EMCDDA), hallucinogenic mushrooms drug profile (retrieved 2026-07-18)
- Ley Orgánica 4/2015 de protección de la seguridad ciudadana (BOE-A-2015-3442) (retrieved 2026-07-18)
- Psychedelics, epilepsy, and seizures: a review (retrieved 2026-07-18)