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Hannes Kettner

Imperial College London, University of California, San Francisco

63 papers in the library · 3,022 citations · publishing 2018-2026

Papers

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Can pragmatic research, real-world data and digital technologies aid the development of psychedelic medicine?

Journal of Psychopharmacology April 22, 2021 Robin Carhart-Harris, Anne C Wagner, Manish Agrawal et al. 54 citations

Favourable regulatory assessments, liberal policy changes, new research centres and substantial commercial investment signal that psychedelic therapy is making a major comeback. Positive findings from modern trials are catalysing developments, but it is questionable whether current confirmatory trials are sufficient for advancing our understanding of safety and best practice. Here we suggest...

DOI: 10.1177/02698811211008567 (opens in new tab) Full text (opens in new tab) Psychedelic therapy Psychedelic medicine Innovative treatments Psychopharmacology +20

Psychedelic Communitas: Intersubjective Experience During Psychedelic Group Sessions Predicts Enduring Changes in Psychological Wellbeing and Social Connectedness.

Frontiers in Pharmacology March 25, 2021 Hannes Kettner, Fernando E. Rosas, C. Timmermann et al. 205 citations

Background: Recent years have seen a resurgence of research on the potential of psychedelic substances to treat addictive and mood disorders. Historically and contemporarily, psychedelic studies have emphasized the importance of contextual elements ('set and setting') in modulating acute drug effects, and ultimately, influencing long-term outcomes. Nevertheless, current small-scale clinical and...

DOI: 10.3389/fphar.2021.623985 (opens in new tab) Full text (opens in new tab) Mental health Wellbeing Collective experience Social connectedness +4

Psychedelics and Health Behavior Change - Journal of Psychopharmacology (in press)

March 24, 2021 Pedro J. Teixeira, Matthew W. Johnson, Christopher Timmermann et al. 1 citation preprint

Healthful behaviors such as maintaining a balanced diet, being physically active, and refraining from smoking have major impacts on the risk of developing cancer, diabetes, cardiovascular diseases, and other serious conditions. The burden of the so-called “lifestyle diseases” - in personal suffering, premature mortality, and public health costs - is considerable. Consequently, interventions...

Association Between Lifetime Classic Psychedelic Use and Hypertension in the Past Year

Hypertension March 8, 2021 Otto Simonsson, Peter S. Hendricks, Robin Carhart-Harris et al. 36 citations

Using data from the National Survey on Drug Use and Health (2005–2014), weighted to be representative of the US adult population, the present study investigated the association between lifetime classic psychedelic use and hypertension in the past year among adults in the United States. The results showed that respondents who reported having used a classic psychedelic at least once in their...

Positive expectations predict improved mental-health outcomes linked to psychedelic microdosing

Scientific Reports January 21, 2021 Laura Kaertner, Michael B. Steinborn, Hannes Kettner et al. 152 citations

Abstract Psychedelic microdosing describes the ingestion of near-threshold perceptible doses of classic psychedelic substances. Anecdotal reports and observational studies suggest that microdosing may promote positive mood and well-being, but recent placebo-controlled studies failed to find compelling evidence for this. The present study collected web-based mental health and related data using...

Post-Psychedelic Reductions in Experiential Avoidance Are Associated With Decreases in Depression Severity and Suicidal Ideation

Frontiers in Psychiatry August 7, 2020 Richard J. Zeifman, Anne Catherine Wagner, Ros Watts et al. 104 citations

Psychedelic therapy shows promise as a novel intervention for a wide range of mental health concerns but its therapeutic action is incompletely understood. In line with acceptance and commitment therapy's (ACT's) transdiagnostic model, qualitative research has suggested that reductions in experiential avoidance are an important component of therapeutic outcomes associated with psychedelics....

DOI: 10.3389/fpsyt.2020.00782 (opens in new tab) Anxiety Suicidal ideation Experiential avoidance Depression economics +5

From Egoism to Ecoism: Psychedelics Increase Nature Relatedness in a State-Mediated and Context-Dependent Manner.

International Journal of Environmental Research and Public Health December 16, 2019 Hannes Kettner, Sam Gandy, Eline Haijen et al. 159 citations

(1) Background: There appears to be a growing disconnection between humans and their natural environments which has been linked to poor mental health and ecological destruction. Previous research suggests that individual levels of nature relatedness can be increased through the use of classical psychedelic compounds, although a causal link between psychedelic use and nature relatedness has not...

Motives for Classical and Novel Psychoactive Substances Use in Psychedelic Polydrug Users

Contemporary Drug Problems September 1, 2019 Hannes Kettner, Natasha L. Mason, Kim P. C. Kuypers 50 citations

Novel psychoactive substances (NPS) are compounds designed to mimic the effects of existing recreational drugs (classical psychoactive substances [CPS]), while eluding established legal frameworks. Little is known about their effects and potential harms, rendering the increasing number of NPS a challenge to policy makers and researchers alike. Quantitative studies on the motives underlying NPS...

Predicting Responses to Psychedelics: A Prospective Study

Frontiers in Pharmacology November 2, 2018 Adam Hampshire, Christopher Timmermann, Christopher Timmermann et al. 422 citations

Responses to psychedelics are notoriously difficult to predict, yet significant work is currently underway to assess their therapeutic potential and the level of interest in psychedelics among the general public appears to be increasing. We aimed to collect prospective data in order to improve our ability to predict acute- and longer-term responses to psychedelics. Individuals who planned to...

DOI: 10.3389/fphar.2018.00897 (opens in new tab) Psychedelic outcomes Psychological well-being Predictive factors

Turn on, Tune in, and Drop out: Predictors of Attrition in a Prospective Observational Cohort Study on Psychedelic Use (Preprint)

Sebastian Hübner, Eline Haijen, Mendel Kaelen et al. 2 citations

BACKGROUND The resurgence of research and public interest in the positive psychological effects of psychedelics, together with advancements in digital data collection techniques, have brought forth a new type of research design, which involves prospectively gathering large-scale naturalistic data from psychedelic users; that is, before and after the use of a psychedelic compound. A...

DOI: 10.2196/preprints.25973 (opens in new tab) Psychedelic research Psychedelics studies Hallucinogen research Entheogen studies +17

Observational cohort study of a group-based VR program to improve mental health and wellbeing in people with life-threatening illnesses

Joe Hardy, Hannes Kettner, David R. Glowacki et al. preprint

Introduction. Being diagnosed with a life-threatening illness (LTI) is often accompanied by feelings of fear, uncertainty, and loneliness that can severely impact mental health. Relatively few interventions are available to address the existential concerns of individuals facing LTI, while treatment of the underlying physical ailment typically remains the priority of the healthcare system....

DOI: 10.31234/osf.io/rs8ny (opens in new tab) Virtual reality Mental health Serious illness Digital therapeutics

Tales of the unexpected: psychedelic trial design solutions

Robin Carhart-Harris, Will Alexander Lucas, Lorenzo Pasquini et al. preprint

This article spotlights problematic assumptions and practices in clinical psychedelic research that together hamper the field’s ability to demonstrate causal identification, contributing to confusion and misunderstanding: (1) the main problematic assumption is that pretreatment expectancy causes therapeutic response; while expectancy predicts response to most treatments, it is becoming...