Truffle safety, difficult experiences and getting support

If something difficult is happening right now: call 112 if the person is in danger, is aggressive or is doing something dangerous, or if you can't keep them safe. If it's frightening but not dangerous, jump to "If a difficult experience is happening now". Everything else on this page can wait.

Maybe you've bought magic truffles, maybe you're only thinking about it, or maybe a friend is. Either way, there are two sensible questions: what can go wrong, and what actually helps? This page covers who should stay away from psilocybin or talk to a professional first, what difficult experiences look like and what Dutch harm-reduction organisations say about handling them, where to get help in the Netherlands, and what vendors claim about "trip stopper" products next to what the evidence shows.

It's a reference page rather than a how-to-use guide, so you'll find no dosing advice and no product recommendations. Pick the section you need and skip the rest.

The short version

• Psilocybin is the active compound in magic truffles (sclerotia) and mushrooms. In the Netherlands, fresh truffles are sold legally in smartshops and mushrooms are not; the position on dried truffles is disputed between sources (details below). Legal is not the same as risk-free. (Drugs Info on the Dutch legal position, read 8 October 2026)
• The main risks are psychological and practical: overwhelming fear or confusion, accidents, and, for some people, longer-lasting anxiety or perceptual problems. In people who are vulnerable, psychosis is a recognised risk.
• A history of psychosis, in you or your family, is the clearest "don't". Lithium, other psychiatric medicines, heart problems and pregnancy are all reasons to stop and speak to a professional first.
• The guidance for a hard moment is low-tech: a calm place, a sober person you trust, no further use, and time.
• We found no evidence that a supplement can "stop" a psilocybin experience. Some smartshop products are sold with that promise, while Drugs Info says it isn't possible to end a trip early. The claims and the evidence are set side by side below.

Who should not use psilocybin, or should talk to a professional first

A web page can't tell you whether psilocybin is safe for you. What the sources do agree on is a set of situations where the risk is higher and a conversation with a doctor or pharmacist should come first.

Psychosis or bipolar disorder, personally or in the family

Drugs en Uitgaan, a Dutch harm-reduction site, says that if you have a predisposition to psychosis, using psychedelics can trigger a (first) psychosis. Drugs Info, the information service run by the Trimbos Institute, says mushrooms and truffles can trigger or worsen a psychosis, and that the chance is greatest in people who are susceptible, for example because it runs in the family or they've had a psychosis before.

Research safety guidelines say the same in clinical language. Johnson, Richards and Griffiths (2008, Journal of Psychopharmacology) describe prolonged psychoses triggered by hallucinogens as less common than a "bad trip", and list excluding volunteers with a personal or family history of psychotic disorders, or other severe psychiatric disorders, as a safeguard. For bipolar disorder, the most we can say is what Nayak and colleagues (2021) report: patients with bipolar disorder have been excluded from recent psychedelic trials, so there is little information on psychedelics in people with that diagnosis.

Lithium and other psychiatric medicines

Lithium is the clearest case. Nayak and colleagues analysed 62 online reports of lithium taken with a classic psychedelic: 47% described seizures, a further 18% a bad trip, and 39% involved medical attention. These are self-reported accounts from websites, not a clinical trial, and the authors call for more research, but they provisionally concluded that psychedelic use may carry a significant seizure risk for people on lithium.

For other psychiatric medicines the evidence is thin. A systematic review (Sarparast and colleagues, 2022) included 40 publications on MDMA or psilocybin with psychiatric drugs, and only five were about psilocybin. The 2008 research guidelines excluded volunteers taking tricyclic antidepressants, lithium, SSRIs and haloperidol. That is a precaution for a research setting, not proof of harm, but it shows how little is settled. If you take any prescribed medicine, ask your pharmacist or doctor first. Our page on supplements and drug interactions explains how to ask.

Heart and blood pressure

Psilocybin raises heart rate and blood pressure, though only moderately in a pooled analysis of three controlled studies with 85 healthy volunteers (Straumann and colleagues, 2024, Neuroscience Applied). A heart rate above 100 beats a minute followed 7% of doses, and no serious adverse reactions occurred. The 2008 guidelines say volunteers were excluded if resting blood pressure exceeded 140/90 mmHg. If you have a heart condition or high blood pressure, that is a question for your doctor. We found no Dutch harm-reduction page that sets out cardiac limits, so we don't give any.

Pregnancy

Jellinek, a Dutch addiction-care organisation, advises against use in pregnancy (Jellinek, page version 22 July 2015, read 8 October 2026). Drugs Info says little is known about the harmful effects of mushrooms or truffles on an unborn child and calls it sensible not to use them while pregnant or breastfeeding. The research guidelines excluded pregnant volunteers, and we found no study of what happens in pregnancy. Jellinek's page is old, so treat it as a long-standing caution, not new research.

Feeling low, anxious or unwell in general

Talk to FRANK, the UK government's drug advice service, warns of adverse psychological reactions, particularly with existing mental health conditions, and advises caution if you're feeling low or worried, or are with people you don't trust. Drugs Info and Jellinek also say to use only when you're in good physical and mental condition.

What a difficult experience can look like

"Bad trip" is the everyday phrase. It can mean anything from a bout of nervousness to terror, paranoia or a feeling of losing your mind.

The most useful numbers come from a survey of 1,993 people who described their single most challenging experience with psilocybin mushrooms (Carbonaro and colleagues, 2016, Journal of Psychopharmacology). It is a self-selected online survey about people's worst experience, so it can't tell you how often hard experiences happen across all users. Among those who described one:

• 39% ranked it among the five most challenging experiences of their life.
• 11% put themselves or others at risk of physical harm. Risk was higher with a larger estimated dose, a longer and harder experience, and a lack of physical comfort and social support.
• 2.6% behaved in a physically aggressive or violent way, and 2.7% received medical help.
• Of those whose experience was more than a year earlier, 7.6% had sought treatment for lasting psychological symptoms. Three cases appeared linked to the onset of lasting psychotic symptoms and three to suicide attempts.
• 84% said they had benefited from the experience despite the difficulty. That doesn't make a terrifying night acceptable. It does show that a hard experience and lasting harm are not the same thing.

The authors say risky behaviour or lasting distress is extremely rare when psilocybin is given in laboratory studies to screened, prepared and supported participants. Outside the lab, people usually have less of that screening and support.

Truffles add some uncertainty of their own. One laboratory analysis of Psilocybe sclerotia found psilocybin ranging from 59.3 to 167.8 micrograms per 100 mg of fresh material (Pellegrini and colleagues, 2013, Drug Testing and Analysis; one set of samples). Drugs Info says it is hard to estimate how many truffles are needed. The practical point is that you can't judge strength by looking at a pack. This page doesn't give dosing advice.

If a difficult experience is happening now

What follows is the advice Dutch and UK harm-reduction organisations publish, attributed to each.

• Drugs en Uitgaan (bad-trip FAQ and first-aid page): find a quiet place; make sure someone stays with you, ideally a sober trip sitter; talk about pleasant things; try calming or distracting activities; something sweet such as fruit may help. When helping someone else: reassure them, don't deny that they feel bad but tell them it will pass, and keep them in sight and away from traffic. The site says a bad trip always passes on its own.
• Jellinek describes the "ARRRT" approach, which it attributes to the Haight-Ashbury clinic: acceptance without judgement, reducing stimulation (a quiet, dim space), reassurance, rest, and talking calmly about positive topics.
• Drugs Info says a bad trip often follows a high dose or an unsuitable mindset or setting, and advises having a trip sitter, someone who has not used.
• FRANK says to tell your friends and get to a quiet place where you feel safe.

Three things sit around those steps:

1. Nothing else on top. Drugs Info and Jellinek both say not to combine psilocybin with other drugs, and Jellinek names alcohol and cannabis specifically.
2. Time is part of the answer. Drugs Info puts the effects at roughly 3 to 4 hours. Anxiety afterwards may continue even when the substance has worn off.
3. Professional help for real danger. Jellinek and Drugs en Uitgaan both say to call 112 if severe restlessness continues, the person becomes aggressive, or they do dangerous things.

A web page can't replace someone who knows you and can respond to the moment, so this stays close to what these organisations publish.

Where to get help in the Netherlands

These details come from the linked pages as read on 8 October 2026. Most of those pages carry no date, and hours, prices and numbers change, so check the page before you rely on them.

• Situation: Life in danger, aggression, dangerous behaviour, or you can't keep someone safe; What to do: 112; What the source says: Thuisarts: "Ben jij in levensgevaar? Of iemand anders? Bel dan meteen 112." Drugs en Uitgaan and Jellinek give the same instruction for severe agitation or aggression. Drugs en Uitgaan also notes that using truffles is not prohibited, so you can seek help without legal consequences.
• Situation: Worried about health, not life-threatening, during the day; What to do: Your own huisarts (GP); What the source says: Thuisarts: contact your GP if the practice is open (8:00 to 17:00 on workdays), using the urgent option in the phone menu.
• Situation: Evening, night, weekend or holiday; What to do: The huisartsenpost (out-of-hours GP service); What the source says: Thuisarts: find the number on your own GP's website or answering service. The huisartsenpost triages calls and can give advice, arrange a visit or send an ambulance. We found no single national number, so we don't give one.
• Situation: Questions about a substance, or about a difficult experience afterwards; What to do: Drugs Info line: 0900-1995 (€0.10 a minute); What the source says: Drugs Info contact page: phone Monday to Friday 09:00 to 17:00, chat Monday to Friday 13:00 to 17:00, email answered within 5 working days, anonymous. The page doesn't cover emergencies, so use 112 for those.
• Situation: Thoughts of suicide; What to do: 113 Zelfmoordpreventie; What the source says: 113.nl: free and anonymous by phone (113) or chat.
• Situation: General advice, or help finding the right care, in the afternoon; What to do: Jellinek, 088 505 1220; What the source says: Jellinek's general advice and intake line: its page says "Bel 088 505 1220 (13u - 17u)" beside an offer to help you find care for yourself or someone close to you. It isn't a crisis line, and the page doesn't state the days. For danger, call 112.
• Situation: Complaints that last weeks after use, or that worry you; What to do: Landelijk Medisch Spreekuur Partydrugs; What the source says: Drugs en Uitgaan points here if symptoms last longer than you'd expect. The service describes itself as a free telephone consultation with experts and doctors who know party drugs, with no referral needed; you sign up through a form and receive a proposed call time by email. It isn't an emergency service. We found no phone number or opening hours on the page, so use the form there.

If you're unsure whether it's an emergency, treat it as one and call 112.

After the experience

The sources describe several things that can follow a difficult experience.

• Lingering anxiety and a hazy head. Drugs Info says a bad trip passes once the substance has worn off, though a person may still feel anxious for a while afterwards. Jellinek says you can feel hazy and unfocused for some time after use. In the Carbonaro survey, 7.6% of people whose experience was over a year earlier had sought treatment for enduring symptoms. If a bad experience stays with you, tell your GP, call the Drugs Info line, or consider the Landelijk Medisch Spreekuur Partydrugs listed above. Asking for help afterwards is a perfectly normal thing to do.
• Depersonalisation and derealisation (feeling detached from yourself or the world) are listed as risks by Drugs en Uitgaan and Drugs Info. We found no reliable figure for how often this follows truffles.
• Flashbacks and HPPD. A flashback is a brief re-experiencing of perceptual effects. Hallucinogen persisting perception disorder (HPPD) is a continuing disturbance, such as visual changes, that causes distress. A 2026 review chapter by Žuljević and Majić says HPPD has a generally low relative prevalence, that flashbacks and reactivations may be more common but are less documented, and that in most HPPD cases symptoms subside within a year or fade to a tolerable level. It also warns that counting every flashback as HPPD inflates prevalence estimates. In a controlled study, 5 of 85 healthy volunteers (6%) reported transient flashback phenomena after a single psilocybin dose (Straumann et al., 2024). The 2008 guidelines call HPPD's incidence unknown but thought to be very uncommon. In short: it can happen, no one has a precise figure, and the reviews describe it as uncommon. If you notice persistent visual disturbances, see a doctor so other causes can be checked.
• Psychosis. Carbonaro found three cases among 1,993 respondents that appeared linked to lasting psychotic symptoms. That isn't an incidence figure, but it is why the family-history question above matters.

Accidents, driving and mixing

• Driving. Drugs en Uitgaan calls taking part in traffic under the influence "levensgevaarlijk" (life-threatening), and Jellinek says it is a bad plan and prohibited. Drugs en Uitgaan says psilocybin worsens concentration and reaction time, and adds that drowsiness and reduced concentration can linger, and that taking part in traffic afterwards is not sensible. The research guidelines told volunteers not to drive or do anything potentially dangerous for the rest of the day.
• Physical risk. Carbonaro's 11% who put themselves or others at risk of physical harm are the reason to take the practical side seriously. The survey linked that risk to higher doses and a lack of physical comfort and social support.
• Mixing. Drugs Info, Jellinek and FRANK all warn against combining drugs. Jellinek names alcohol and cannabis. FRANK says mixing drugs is always risky and some mixtures are more dangerous than others.
• A wild mushroom is not a truffle. FRANK says the biggest danger to health when taking magic mushrooms is eating a poisonous one by mistake. Drugs en Uitgaan warns against picking wild mushrooms.

"Trip stoppers" and "trip killers": what is claimed, and what is known

You may have seen small capsule packs in smartshops sold for when an experience becomes too much. They deserve a careful look, because someone who is panicking can pin a lot of hope on a capsule, and it helps to know what is actually behind the promise.

What vendors say

These are supplier claims from pages read on 8 October 2026, not evidence. For contrast, Drugs Info says it isn't possible to end a trip early: you can change the surroundings or talk to someone you trust, and a bad trip passes once the substance has worn off.

• Azarius (Trip Stopper, €2.95) lists valerian extract 10:1, maltodextrin, magnesium stearate and a vegan capsule shell. It describes "fast-acting valerian capsules that take the edge off when an experience gets overwhelming", says they take the edge off "rather than shutting the experience down entirely", and says they work "within 30 to 60 minutes". It advises finding a calm spot, staying with someone you trust and not redosing too quickly, and checking with a healthcare provider if you take prescription medication.
• Zamnesia (Trip Stopper 3000) lists valerian extract 5:1, maltodextrin, a bulking agent and a capsule shell. It makes a stronger claim than Azarius: "Trip Stopper 3000 can help put an end to a bad trip", and elsewhere that it helps to "calm your nerves and minimise the effects of a bad trip".
• Azarius' own wiki article (Trip Stoppers: How They Work, last updated April 2026) is more cautious than the product pages on ending an experience. It says "they are not an off switch — nothing is", that supplement kits do not end the experience, that the role of vitamin C is unclear and may be mainly a placebo anchor, and that benzodiazepines can reduce panic but carry a risk of respiratory depression alongside depressants. The same article has an evidence table in which Azarius rates maltodextrin "Strong (basic physiology, well-established)" and valerian "Moderate (systematic reviews in non-psychedelic contexts)". Those are the vendor's own ratings, and both rest on evidence from other situations, not on studies of psilocybin experiences. The next section sets them against what we found.

We quote these pages as vendor claims, not as recommendations.

What evidence exists

• Idea: Valerian (a calming herb; Azarius rates the evidence "Moderate", Zamnesia says it can help end a bad trip); What we found: We found no study of valerian during a psilocybin experience. Azarius's own rating refers to systematic reviews in non-psychedelic contexts, so it speaks to valerian as a mild calming herb in general, not to a trip. Nothing we found supports "ending" an experience.
• Idea: Maltodextrin (a fast-absorbing carbohydrate; Azarius rates the evidence "Strong", on the idea of correcting blood-sugar dips); What we found: Azarius's "Strong" refers to basic physiology: maltodextrin does raise blood sugar quickly. That is a different claim from helping with a difficult trip. We found no study showing blood-sugar dips are a typical driver of distress with psilocybin, and none testing maltodextrin for it. Drugs en Uitgaan suggests something sweet such as fruit, which is practical comfort, not a documented way to end an experience.
• Idea: Vitamin C or lemon juice; What we found: We found no study showing that either ends or shortens a psilocybin experience. Azarius' own wiki says there is no solid evidence for vitamin C.
• Idea: Ketanserin (a medicine that blocks 5-HT2A receptors); What we found: This is where real pharmacology exists. In a placebo-controlled study with 16 volunteers, ketanserin given before psilocybin reduced psilocybin-induced inhibition deficits on attention tasks and altered-state ratings (Quednow and colleagues, 2012); it didn't measure psilocybin's effects in general. In a randomised trial in 24 healthy volunteers, ketanserin 40 mg given one hour after LSD (not psilocybin) cut the duration of subjective effects from 8.5 to 3.5 hours (Becker and colleagues, 2023, International Journal of Neuropsychopharmacology). Those were supervised research settings using a medicine, not a supplement, and nothing in them suggests that a herbal capsule works the same way.
• Idea: Benzodiazepines; What we found: The 2008 research guidelines say that when reassurance alone is insufficient, "treatment with a benzodiazepine anxiolytic is the pharmacological intervention of choice" in a supervised research session. That is a medical decision for clinicians. These are prescription medicines with their own risks, including with alcohol or other sedatives, so they aren't something to improvise with.

What this adds up to

• Established: psilocybin's psychedelic effects depend on 5-HT2A receptor activity; a 5-HT2A blocker can reduce or shorten psychedelic effects in controlled research (shown for LSD after dosing, and for psilocybin when given beforehand); and research guidelines name benzodiazepines as the pharmacological option when reassurance isn't enough.
• Not established: that valerian, maltodextrin, vitamin C, lemon juice or any other over-the-counter product can stop, shorten or reliably soften a psilocybin experience. Lack of evidence isn't proof that something does nothing, but it is no basis for relying on it. We searched the published literature and may have missed a study.
• Practical: a capsule could still be a comfort, because having something to do and focus on can feel calming. That is a plausible effect, not a demonstrated one. If a capsule gives false confidence ("I've got my stopper, so I'm covered"), it could do harm. The organisations quoted above put the calm place, the sober person and time at the centre, and 112 for real danger.

Product risks

• Labels and mislabelling. We found no recent Dutch study of mislabelling in smartshop truffles, so we can't give a figure. Drugs Info lists unpredictable strength among the risks and, for mushrooms, misidentification.
• Legal status. Read on 8 October 2026: Drugs Info, Jellinek and Drugs en Uitgaan say fresh truffles are sold legally in Dutch smartshops, while mushrooms are on List II of the Opium Act (Drugs Info). The sources differ on dried truffles: Jellinek says they fall under List I, while Drugs Info and Drugs en Uitgaan make no such distinction, so we treat dried truffles as unresolved. Nothing we found about the designer-drug ban of 1 July 2025 mentions truffles, but check official wording yourself. Laws change, and Dutch rules don't apply across the EU, so check the current law wherever you are.

Next reading

• Supplements and drug interactions, for how to ask a pharmacist about medicines.
• How to read supplement labels, for reading any label with a critical eye.

Written by Smart Supplements with AI assistance from the sources linked in the text. It has not been reviewed by a clinician.

Last updated: 12 October 2026

This article is for informational purposes only and is not intended as medical advice. Always consult a healthcare professional before starting any new supplement, especially if you take prescription medication.