Perception can change
Time, sounds, images and the sense of self may feel different.
Feelings can vary
Joy, fear, connection and confusion are all possible.
Certainty is not proof
A vivid memory or strong insight still needs careful reflection.

Phenomenology:
- Sense of unity and connectedness
- Sense of sacredness
- Transcendence of time and space
- A feeling of objectivity or reality; a sense of certainty does not establish factual truth.
- Deeply felt positive mood
- Difficulty putting the experience into words
- Feelings or ideas that seem contradictory
- Effects that change over time
- Some people report later changes in attitude and behaviour; these are not guaranteed.
Characteristics of the Journey:
Positive:
- Changes in associative or creative thinking; improved problem-solving is not guaranteed.
- A feeling of greater mental flexibility or unfamiliar thought patterns.
- Closed and open-eyed visuals
- Sense of openness
- Feelings of interconnectedness with people, the world, and/or universe at large.
- Transcendence of space and time
- Feelings of euphoria, joy, or awe
- Mystical / spiritual experiences: experience of death or rebirth, out of body experience, coming into contact with deities, visionaries or other spiritual figures.
- Feelings of relief, wholeness, freedom, and affirmation.
Other changes:
- Ego dissolution
- Reduced body awareness and spatial location
- No sense of time
- Impaired cognition, lack of focus
- The full spectrum of emotions
- Increases in blood pressure, heart rate or body temperature; their significance depends on the substance and your health.
- Dilated pupils, impaired movement coordination.
Difficult:
- Intense feelings of paranoia or that something is wrong.
- Thought loops often referred to as mental looping.
- Reliving traumatic or difficult memories.
- Ego dissolution.
- A sense that one is dying and/or is being reborn.
- Vomiting may be interpreted symbolically, but it is not evidence that emotions or memories are being physically purged.
- Intense negative emotions such as anxiety or fear leading to overwhelm and panic.
- Transient dizziness, nausea, vomiting
Evidence reviewed: September 27, 2026.
These describe possible experiences, not outcomes everyone should expect or aim for. Vivid memories and strong conviction are not independent evidence of what happened. See the neuroscience explanation. Doss et al. (2023).