Post-psychedelic and meditation-related challenges: a protocol for a mixed-methods longitudinal-observational study
This paper outlines a mixed-methods, longitudinal-observational study protocol designed to characterize the clinical features, longitudinal course, and functional impacts of persisting adverse effects following psychedelic use and meditation practice by comparing two parallel groups of 800 participants through surveys, ambulatory assessments, and qualitative interviews.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of a preprint that has not been peer-reviewed. It is not medical advice. Do not make health decisions based on this content. Read full disclaimer
For decades, people have turned to two distinct paths to alter their state of mind and find relief from suffering: the use of psychedelic substances and the practice of meditation. One involves taking a chemical compound that temporarily changes how the brain processes the world, while the other involves training the mind to focus, observe, and let go of thoughts. Both have shown promise in helping people with difficult psychiatric conditions and in boosting general well-being. Yet, just as a powerful medicine can sometimes cause unexpected side effects, these practices can also lead to difficult, lasting problems for some users. While scientists have spent years studying the benefits, they have not yet mapped out the full landscape of these negative experiences. We know that some people feel worse after a psychedelic trip or a period of deep meditation, but we do not fully understand what those feelings look like, how long they last, or why they happen. Without a clear picture of these challenges, it is difficult for doctors and support networks to help those who are struggling.
To fill this gap, a team of researchers has launched a massive, long-term study designed to listen closely to the people who have experienced these difficulties. The study does not test new drugs or teach new meditation techniques; instead, it acts as a detailed census of the aftermath. The researchers are recruiting 1,600 people who report that they are still suffering from distress or impairment that began after using psychedelics or practicing meditation. They are splitting these participants into two groups: those whose struggles started with a psychedelic experience and those whose struggles started with meditation. The goal is to compare these two groups side by side to see if their problems look the same or if they are fundamentally different.
The study is built on four layers of investigation, moving from broad surveys to deep, personal conversations. First, the team is asking 1,600 people to fill out a comprehensive online questionnaire. This survey asks about the specific details of their experience: what substance they took or what type of meditation they practiced, where they were, who they were with, and exactly what symptoms they are facing. The researchers are looking for a wide range of issues, from feeling detached from reality and seeing things that aren't there, to feeling overwhelmed by emotions or losing a sense of who they are. They are also asking about the practical consequences of these feelings, such as whether the person lost their job, had to leave school, or ended up in a hospital.
From this large group, the researchers will select 800 people who are still dealing with these problems to join a second phase that lasts for one year. These participants will fill out shorter surveys every two months. This part of the study is crucial because it allows the scientists to watch how these challenges change over time. Instead of relying on a person's memory of what happened a year ago, the researchers can see if the symptoms are getting better, staying the same, or getting worse as the months pass. They will also track what helps and what does not, noting whether people find relief through therapy, medication, lifestyle changes, or by talking to others.
To get an even closer look, a small group of 40 participants will be asked to keep a weekly diary for three months. Using a smartphone app, they will record short voice notes describing their week in their own words, along with quick ratings of their mood and sleep. This method captures the daily rhythm of their struggle, offering a raw, unfiltered view of how these challenges feel in the moment. Finally, the team will conduct in-depth interviews with 60 people, spending an hour or more with each to explore their stories in detail. These conversations aim to uncover the personal meaning behind the symptoms and how the individuals make sense of their experiences.
This research is currently underway, with the first results expected in late 2028. Because the study is still in progress, the researchers have not yet found specific answers about which treatments work best or exactly how many people are affected. What they have established is a rigorous framework for gathering the data needed to answer these questions. By comparing the experiences of those who used psychedelics with those who meditated, the study hopes to reveal whether these two very different paths lead to similar kinds of trouble or if they require completely different approaches to healing. The ultimate goal is to create a clear, evidence-based guide that can help clinicians and support groups understand and treat these difficult, lingering effects, ensuring that the path to healing does not leave anyone behind.
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