While research suggests that psilocybin is relatively safe in controlled settings, there are important safety considerations and precautions to be aware of. This page provides evidence-based information about the potential risks and safety measures associated with psilocybin mushrooms.
Disclaimer: This information is provided for educational purposes only and should not be considered medical advice. Always consult healthcare professionals for personalized guidance. The use of psilocybin mushrooms is illegal in many jurisdictions.
Individual Variability
The effects of magic mushrooms can vary significantly between individuals depending on several factors:
- The amount consumed
- The individual's mental state and personality
- Previous experiences with psychedelics
- Expectations and intentions
- The environment in which they are used
- Individual biochemistry and genetics
This variability means that experiences can be unpredictable, even for individuals who have used psilocybin mushrooms previously.
Physical Safety Considerations
Psilocybin can cause several physical effects that may pose safety concerns:
Cardiovascular Effects
Psilocybin can temporarily increase blood pressure and heart rate. While these effects are generally mild and not dangerous for healthy individuals, they could potentially pose risks for people with pre-existing cardiovascular conditions.
Nausea and Digestive Discomfort
Many people experience nausea, stomach discomfort, or vomiting, particularly during the first hour after consumption. These effects are typically temporary but can be uncomfortable.
Dizziness and Coordination
Psilocybin can cause dizziness, impaired coordination, and altered spatial perception, increasing the risk of falls or accidents. It's important to be in a safe environment without hazards.
Headaches
Some individuals report headaches during or after the psilocybin experience, which typically resolve within 24 hours.
Psychological Safety Considerations
The psychological effects of psilocybin can be profound and potentially challenging:
"Bad Trips"
Some users experience what are commonly called "bad trips," which can involve extreme fear, confusion, anxiety, paranoia, and distressing thoughts or emotions. These experiences can be frightening but are typically temporary, resolving as the effects of psilocybin wear off.
Anxiety and Panic
Psilocybin can induce anxiety or panic reactions, particularly in unfamiliar or uncomfortable environments or in individuals predisposed to anxiety.
Psychosis-Like Symptoms
In rare cases, psilocybin use can trigger psychosis-like symptoms such as paranoia, delusions, or disorganized thinking. These effects are more likely in individuals with a personal or family history of psychotic disorders.
Figure 1: Illustration of the spectrum of psychological effects that can occur with psilocybin use, from positive to challenging experiences.
Who Should Avoid Psilocybin
Psilocybin is not appropriate for everyone. The following groups should generally avoid psilocybin use:
- Individuals with a personal or family history of psychosis (schizophrenia, schizoaffective disorder, bipolar disorder with psychotic features) due to the potential risk of triggering or exacerbating these conditions
- People with severe cardiovascular conditions such as uncontrolled hypertension or heart disease
- Individuals taking certain medications that may interact with psilocybin, including:
- Serotonergic drugs (SSRIs, SNRIs, MAOIs, triptans)
- Lithium
- Tramadol
- Certain antipsychotics
- Pregnant or breastfeeding individuals due to insufficient safety data
- People with severe anxiety disorders who may be at higher risk for challenging experiences
- Individuals with liver or kidney disease that might affect metabolism of psilocybin
Potential Long-Term Risks
While psilocybin is not considered physically addictive, there are potential long-term risks to consider:
Hallucinogen Persisting Perception Disorder (HPPD)
In rare cases, individuals may experience persistent visual disturbances after psilocybin use, known as HPPD. These can include halos around objects, trails of moving objects, or geometric patterns, particularly in low light. While typically not debilitating, these symptoms can be distressing for some individuals.
Flashbacks
Some individuals report experiencing brief recurrences of psychedelic effects long after the drug has worn off. These are typically triggered by stress, fatigue, or entering similar environments to those in which the psychedelic was used.
Psychological Dependence
While not physically addictive, psychological dependence can occur in some individuals, particularly with frequent use.
Mushroom Identification Risks
One of the most significant safety concerns with psilocybin mushrooms is the risk of misidentification. Many poisonous mushroom species can resemble psilocybin-containing mushrooms, and misidentification can lead to severe illness or death.
Key risks include:
- Confusion with deadly Galerina or Cortinarius species
- Mistaking toxic Gymnopilus species for psychoactive ones
- Consuming mushrooms with environmental contaminants
Wild mushroom foraging should only be done by those with extensive mycological knowledge or under the guidance of experienced experts.
Harm Reduction Practices
For those who choose to use psilocybin despite legal restrictions and potential risks, harm reduction approaches include:
Set and Setting
"Set" refers to one's mindset, while "setting" refers to the physical and social environment. Both significantly influence the psilocybin experience:
- Set: Approach with a calm, positive mindset; avoid use during periods of psychological distress
- Setting: Choose a comfortable, familiar environment with minimal stimulation and no responsibilities
Sitter or Guide
Having a sober, trusted, and preferably experienced person present can provide reassurance and assistance if challenging situations arise.
Dosage
Starting with a low dose is advisable, particularly for first-time users, to gauge individual sensitivity.
Preparation and Integration
Preparing mentally before use and integrating the experience afterward through reflection, journaling, or discussion can help maximize potential benefits and minimize risks.
Safety in Clinical Settings
In clinical research and therapeutic contexts, psilocybin is administered with numerous safety measures:
- Thorough medical and psychological screening
- Controlled, standardized dosing
- Comfortable, supportive environment
- Presence of trained therapists or guides
- Preparation sessions before and integration sessions after
- Medical monitoring during the experience
- Follow-up care
These controlled conditions significantly reduce risks compared to recreational use and may explain the high safety profile observed in clinical studies.
References
- Johnson, M. W., Richards, W. A., & Griffiths, R. R. (2008). Human hallucinogen research: guidelines for safety. Journal of Psychopharmacology, 22(6), 603-620.
- Carbonaro, T. M., Bradstreet, M. P., Barrett, F. S., MacLean, K. A., Jesse, R., Johnson, M. W., & Griffiths, R. R. (2016). Survey study of challenging experiences after ingesting psilocybin mushrooms: Acute and enduring positive and negative consequences. Journal of Psychopharmacology, 30(12), 1268-1278.
- Nichols, D. E. (2016). Psychedelics. Pharmacological Reviews, 68(2), 264-355.
- Studerus, E., Kometer, M., Hasler, F., & Vollenweider, F. X. (2011). Acute, subacute and long-term subjective effects of psilocybin in healthy humans: a pooled analysis of experimental studies. Journal of Psychopharmacology, 25(11), 1434-1452.
- Halpern, J. H., & Pope, H. G. (2003). Hallucinogen persisting perception disorder: what do we know after 50 years? Drug and Alcohol Dependence, 69(2), 109-119.