The Role of Memory Recall in Psychedelic Integration

‘Psychedelic integration’ is a somewhat nebulous concept. It is often broadly defined as incorporating what one experienced and learned on psychedelics into everyday life. But this loose definition raises many questions, such as how and why certain aspects of the psychedelic experience are integrated. In other words: What techniques effectively aid such integration and what is the desired goal of this integration?

Psychedelic integration is not an objective or formulaic pursuit; a positive change could be related to a previous trip, but to what extent it is related is not definite, and it can also be difficult to separate unconscious (and neuroplasticity) benefits from positive changes that have been consciously worked towards. In addition, it can be challenging to integrate an aspect of a trip if it’s confusing, dark, distressing to think about, or mystical.

The hows and whys of psychedelic integration will, undoubtedly, vary between individuals and cultures. But regardless of what making sense of a trip looks like – and how that sense-making influences one’s life – I think the role of memory recall in this integration process can’t be understated. We can only integrate what we can remember, and the quality of the integration depends on the quality of our memories. Memories, after all, are not simply snapshots or recordings of events but involve all sorts of moulding, interpretation, and narrativisation that add meaning and emotional texture to those events.

If you want to prioritise integration – so that psychedelic experiences lead to sustained changes, and don’t become something you feel the need to repeat again and again – it’s important to pay attention to factors that aid memory consolidation and recall. Your relationship to memories of psychedelic experiences is also essential to how these experiences inform your everyday, sober view of yourself, others, and the world around you.

One factor that can affect one’s ability to recall a trip is how long (and how deeply) one sleeps before and after the experience. Not getting enough sleep impairs both memory encoding (acquiring information) and memory consolidation (storing information). This occurs if you are sleep-deprived from the night before or if you don’t get enough sleep the subsequent night. Regarding these effects, a 2024 literature review published in Neuroscience and Behavorial Reviews found that short sleep can impair memory to a similar degree as not sleeping at all; restricting slow-wave sleep (i.e. deep sleep) impairs memory more than restricting other sleep stages; and catching up on sleep following sleep deprivation may not counteract cognitive costs.

Hence, if you don’t sleep enough (or deeply) the night before a psychedelic journey, memory encoding and consolidation – and, in turn, memory recall – can be impaired, even if you sleep well after the trip. Conversely, if you get a good night’s sleep before the trip but then don’t get a good night’s sleep after it – which is quite common, given that many people trip late at night or struggle to sleep after taking long-lasting psychedelics – then memory recall can also be impacted. Memory recall depends on memory encoding and consolidation. You can only recall what you’ve consolidated, and the quality of that recall depends on the quality of the consolidation. Of course, remembering a psychedelic trip can be difficult irrespective of memory, due to the highly novel, strange, and sometimes ineffable quality of the experience. However, it’s possible that having scattered or hazy memories of the experience could be partly related to sleep duration and quality before and after the trip.

In the preparation and integration stages of a psychedelic session, paying closer attention to sleep hygiene could help not just with the eventual integration of insights and lessons but also with the overall quality of the experience. Being sleep-deprived can sometimes be a recipe for a bad trip

It’s also important to recognise that certain psychoactive drugs can disrupt deep sleep, including cannabis, alcohol, and benzodiazepines, which are common drugs people use during the winding down stage of a trip and as a way to fall asleep. While these drugs often speed up sleep onset, their use has been shown to cause fragmented sleep or less deep sleep. On the other hand, for those with insomnia or unable to sleep at all before or after a trip, lower-quality sleep may be better than no sleep at all.

If you want to ensure you are well-rested before and after a psychedelic experience, it’s important to be careful about the use of certain drugs as a sleep aid. This might involve sticking to low doses (so that effects on sleep are minimised) or avoiding these drugs altogether and opting for alternative ways of inducing sleep and improving sleep duration and quality.

Successfully recalling long-term memories often depends on retrieval cues, which are aspects of your physical and cognitive environment – clues or prompts – that aid the recall process. Since psychedelic trips occur in a specific setting, this setting can contain many prompts that may later act as retrieval cues. Based on the ability of cues to aid long-term memory retrieval, it’s worth considering how psychedelic trips may be designed to be ‘retrieval cue friendly’ to facilitate memory recall and, in turn, psychedelic integration. Features of the setting for a psychedelic journey that could act as useful retrieval cues may include:

• A music playlist, especially one designed to match the different stages of a psychedelic journey
• Journalling during and after the experience, which can include thoughts, emotions, phrases, and insights that come to mind
• Objects that can act as reminders of the day, such as trinkets and jewellery
• Any drawings or artwork created during the trip
• Artwork on display in the space you’re in
• A positive place visited during or just after the experience, which would be easy to revisit 

[I]ntegrating silent intervals in PAP [psychedelic-assisted psychotherapy] can enhance mindfulness practices and therapist-patient interactions, potentially offering distinct therapeutic benefits. Further research is necessary to delineate the differential impacts of music, silence, and guided activities in PAP, given that these three common treatment activities can be understood as both complementary and competing.

Psychedelic integration also involves how we relate to the memories of our psychedelic experiences. The attitudes we take towards positive, negative, or mixed experiences can help or hinder certain goals of integration, such as psychological growth, wholeness, authenticity, and peace of mind.

First, memories of positive trips may become valued as if they were material possessions, something to make one feel special and spiritually superior. This is the attitude of the ‘psychedelic materialism’ and the ‘psychedelic ego’. If one’s hope with psychedelic integration is to become less egotistical and more considerate of others’ needs and interests, these attitudes will be counterproductive. On the other hand, reflecting on aspects of a psychedelic experience such as ego diminishment/dissolution, connectedness, compassion, and awe as insights to put into practice rather than objects to collect can serve more altruistic ends.

Ram Dass warned against getting trapped by our memories of psychedelic experiences, which is common, given how euphoric and freeing these experiences can feel. Adopting the Buddhist attitude of non-attachment, and applying it to these memories, can be a useful way of recognising the value of psychedelic experiences, without the need to hold on to them anxiously, in the hopes of feeling permanently secure.

Memories of negative or difficult trips can be distressing or advantageous to recall, or a mixture of both, depending on the attitude taken towards those memories. Some psychedelic experiences are traumatic, leading to PTSD or PTSD-like symptoms, as reported by Jules Evans. Recalling memories of these experiences can, therefore, be distressing, leading to avoidance of that recall. However, only a small minority of negative trips are traumatic. Most people can recall non-traumatic trips without feeling overwhelmed by those memories. 

What appears to be helpful in terms of dealing with these memories, and making them more positive, is making sense of them through the stories constructed around them. These stories will of course be diverse, but a common (and helpful) way of viewing memories of bad trips includes seeing them as a form of psychological or therapeutic insight. This insight could be about one’s past, present, and future – how events of the past inform one’s present, what needs to change in the present to improve it, and what a more positive future might look like.

On the other hand, it’s also important not to categorise all bad trips as (potentially) full of therapeutic insights, as this might encourage some people to blame themselves for not ‘successfully integrating’ their distressing experiences. Still, it is possible to learn and grow from these negative trips, even if one can’t mine the memories of them for relevant psychological insights.

Reflecting on these memories and giving oneself some credit for how one handled the experience can be helpful. Alternatively, narrativisation might involve an appreciation of the strangeness, novelty, and (perhaps even) comedic elements of the bad trip, thereby transforming a painful memory into a story worth telling. And even if one doesn’t appreciate the trip as a story, the feeling of ‘surviving an ordeal’ can make one more appreciative of the return to sobriety – more specifically, the stability, familiarity, and predictability of being sober.

What is clear is that we need more research on the role of memory in psychedelic integration (assuming that researchers can construct some meaningful measure of ‘integration’). Understanding how memories of trips – and attitudes towards those memories – affect integration will help people make the most of psychedelic sessions and enable recovery from post-psychedelic difficulties.