Psilocybin mushrooms are fungi containing the psychoactive compounds psilocybin and psilocin. They produce profound alterations in perception, thought, and emotion. Used recreationally, spiritually, and increasingly in therapeutic contexts. Effects are highly dose-dependent, ranging from mild mood enhancement to intense mystical experiences.
How It Works
Psilocybin is dephosphorylated to psilocin in the body, which acts as a serotonin 5-HT2A receptor agonist. This disrupts the default mode network (DMN) — the brain's 'autopilot' — leading to altered perception, ego dissolution, and novel neural connectivity patterns. Also affects 5-HT2C, 5-HT1A receptors.
Legal Status
Schedule I in the US federally. Decriminalized in several US cities (Denver, Oakland, DC, etc.). Legal for therapeutic use in Oregon and Colorado. Legal in Jamaica and the Netherlands (as truffles). Active clinical trials for depression, PTSD, and addiction.
Dosage Guide (Oral (dried Psilocybe cubensis))
| Level | Amount (grams dried) |
|---|---|
| Threshold | 0.25g |
| Light | 0.5-1.0g ('museum dose') |
| Common | 1.5-3.0g |
| Strong | 3.0-5.0g ('heroic dose') |
| Heavy | 5.0g+ (intense — only for very experienced users) |
Note: Potency varies hugely between species and even batches. Psilocybe cubensis is standard reference. Psilocybe azurescens can be 3-5x stronger by weight. Lemon tek may intensify effects 1.5-2x. Start low if uncertain about potency.
Organ System Impacts
- neurological — High
- Profound alteration of neural connectivity. Disrupts default mode network. No demonstrated neurotoxicity — psilocybin is one of the least physiologically toxic recreational substances. Psychological effects can be intense.
- cardiovascular — Low
- Mild increase in heart rate and blood pressure. Generally very safe cardiovascularly. No known cardiotoxicity.
- gastrointestinal — Moderate
- Nausea common during onset (chitin in mushroom cell walls). Occasional vomiting. Tea preparation reduces GI distress significantly.
- hepatic — Low
- Psilocybin converted to psilocin. Minimal hepatic burden. No known liver toxicity.
- respiratory — Low
- No significant respiratory effects.
- ocular — Low
- Pupil dilation. Visual perception dramatically altered but no physical eye damage.
- renal — Low
- No significant kidney effects. Excreted renally with minimal burden.
- dermatological — Low
- Flushing possible. No significant skin effects.
- hematological — Low
- No known blood effects.
- musculoskeletal — Low
- Muscle tension, particularly jaw. Generally mild and temporary.
Effects
Desired Effects
- Visual enhancements — colors more vivid, patterns, fractal geometry, synesthesia
- Euphoria and deep emotional connection
- Profound introspection and self-insight
- Mystical or spiritual experiences
- Enhanced empathy and emotional openness
- Sense of unity and interconnectedness
- Creativity and novel thinking
- Cathartic emotional release (laughter, crying)
Negative Effects
- Nausea (especially during come-up)
- Anxiety and fear during come-up or intense moments
- Confusion and thought loops
- Paranoia
- Overwhelming intensity ('bad trip')
- Muscle tension and jaw clenching
- Difficulty communicating
- Emotional vulnerability and crying
Rare but Serious
- Persistent perceptual changes (HPPD — visual snow, tracers, halos persisting after trip)
- Prolonged psychotic episode (extremely rare, more likely in predisposed individuals)
- Severe panic leading to dangerous behavior
- Serotonin syndrome when combined with SSRIs/MAOIs (rare but possible)
- Rhabdomyolysis from extreme physical agitation during severe reactions (very rare)
Drug Interactions
MAOIs (including Ayahuasca) — dangerous
MAOIs prevent psilocin breakdown, dramatically intensifying and prolonging effects. Risk of serotonin syndrome.
Action: Do not combine. If on MAOI medication, psilocybin is contraindicated.
Lithium — dangerous
Lithium combined with psychedelics significantly increases seizure risk.
Action: NEVER combine psilocybin with lithium. This is one of the most dangerous psychedelic combinations.
SSRIs / SNRIs (Antidepressants) — moderate
SSRIs significantly blunt psilocybin effects (both compete at 5-HT2A). Abruptly stopping SSRIs to trip is dangerous. Serotonin syndrome theoretically possible but rare with mushrooms alone.
Action: Do NOT stop prescribed SSRIs to take mushrooms. If on SSRIs, effects will likely be weaker. Consult a doctor before combining.
Cannabis — moderate
Cannabis significantly intensifies psychedelic effects, especially anxiety and paranoia. Can push a manageable trip into overwhelming territory.
Action: Avoid during the trip unless very experienced. If using, tiny amounts only. Wait until after the peak.
Stimulants (Cocaine, Meth) — moderate
Stimulants can increase anxiety and paranoia during a trip. Cardiovascular strain from combined elevated heart rate.
Action: Avoid combining. Stimulants generally worsen psychedelic experiences.
Detection Times
Psilocybin and psilocin are not included in standard drug panels. Specialized testing is required.
Urine
Requires specialized testing. Psilocin is excreted rapidly. Detection window: up to 2 days.
Blood
Very short blood detection window. Detection window: up to 1 days.
Hair
Hair testing for psilocybin exists but is uncommon. Detection window: up to 90 days.
Harm Reduction Tips
- You cannot die from psilocybin alone — there is no known lethal dose in humans. If overwhelmed, remind yourself: this is temporary
- Do not combine with lithium (seizure risk) or MAOIs
- Start with a low dose (1-1.5g) for your first time — you can always take more next time, never less
- Test your mushrooms with Ehrlich reagent — should turn purple (confirms indole alkaloid presence)
- Prepare your space: comfortable, safe, private, familiar. Remove hazards. Have water, blankets, music ready
- Set and setting: your mindset and physical environment are the biggest factors in trip quality
- Have a sober trip sitter — someone you trust who stays sober to help if needed
- Set a playlist — music profoundly shapes the experience. Calm, instrumental music works well
- If having a difficult moment: change the music, change the room, breathe deeply. 'Surrender to the experience' rather than fighting it
- Allow at least 2 weeks between trips (tolerance resets in ~14 days)
- Avoid driving for at least 8 hours after ingestion
- Integration: reflect on the experience afterward. Journaling helps process insights
Withdrawal Symptoms
Severity: Low
Not applicable — psilocybin does not cause physical or psychological dependence.
Psychological
- No withdrawal syndrome reported
Emergency Information
Call 911 If:
- Seizures
- Loss of consciousness
- Person is a danger to self or others and cannot be contained safely
- Serotonin syndrome symptoms (high fever, muscle rigidity, rapid pulse)
- Severe allergic reaction
- Suspected poisoning from misidentified mushrooms (GI symptoms within 6-12 hours of wild mushrooms = possible Amanita poisoning — this is a medical emergency)
What To Do
- Stay calm. Your calm energy directly affects the person tripping
- Move to a safe, comfortable, quiet environment
- Speak in simple, reassuring sentences: 'You took mushrooms. This is temporary. You are safe. I'm here with you.'
- Gentle physical contact if they welcome it (hand on shoulder)
- Change the music to something calming
- Offer water. Don't force food
- Do NOT give more drugs to 'counteract' the trip (benzos are exception — under medical guidance)
- If they are having intense emotions, let them express it. Don't try to shut it down.
What To Tell EMS
The patient ingested psilocybin mushrooms approximately [time] ago. Estimated dose: [amount] grams dried. Current symptoms: [describe]. No known lethal dose in humans. Check for: serotonin syndrome (if on medications), dehydration, trauma from falls/agitation. Benzodiazepines may help manage severe anxiety.
Seek Help If
- Panic or severe anxiety lasting more than 1 hour that doesn't respond to reassurance or environment change
- Person is trying to harm themselves
- Psychotic symptoms lasting beyond the expected trip duration (12+ hours)
- Severe persistent vomiting
- Signs of serotonin syndrome: high fever, rigid muscles, rapid heartbeat, confusion (especially if on medications)
Normal Discomfort
- Nausea during the first hour (common, usually passes)
- Anxiety during come-up (very common, usually passes by peak)
- Crying or intense emotions (part of the experience, not a medical emergency)
- Feeling confused or overwhelmed (normal at higher doses)
- Yawning and muscle tension