The DOI matches its Crossref record; 62 of the 62 references it cites were found in a registry or an index.
Psychedelics and the essential importance of context
Abstract
Psychedelic drugs are making waves as modern trials support their therapeutic potential and various media continue to pique public interest. In this opinion piece, we draw attention to a long-recognised component of the psychedelic treatment model, namely ‘set’ and ‘setting’ – subsumed here under the umbrella term ‘context’. We highlight: (a) the pharmacological mechanisms of classic psychedelics (5-HT2A receptor agonism and associated plasticity) that we believe render their effects exceptionally sensitive to context, (b) a study design for testing assumptions regarding positive interactions between psychedelics and context, and (c) new findings from our group regarding contextual determinants of the quality of a psychedelic experience and how acute experience predicts subsequent long-term mental health outcomes. We hope that this article can: (a) inform on good practice in psychedelic research, (b) provide a roadmap for optimising treatment models, and (c) help tackle unhelpful stigma still surrounding these compounds, while developing an evidence base for long-held assumptions about the critical importance of context in relation to psychedelic use that can help minimise harms and maximise potential benefits.
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In the citing paper
“The psychedelic experience comes with an increased sensitivity to internal and external stimuli.”
In the citing paper
“It follows that the general context of psychedelic administration fundamentally shapes drug response and hence safety, as well as potentially therapeutic efficacy [9, 88].”
In the citing paper
“This highlights the frequent clinical observation that patients may need particularly intensive supportive care during, as well as after psychedelic experiences (Carhart-Harris et al., 2018).”
From Naturalistic psychedelic therapy: The role of relaxation and subjective drug effects in antidepressant response (2024) · cites this paper as Carhart-Harris et al., 2018
In the citing paper
“Psychedelic experiences vary depending not only on individual characteristics, such as health status, but also on the type of preparation available, intentions agreed upon before the experience, and the environment in which the experience takes place (Carhart-Harris et al., 2018; Golden et al., 2022).”
From Naturalistic psychedelic therapy: The role of relaxation and subjective drug effects in antidepressant response (2024) · cites this paper as Carhart-Harris et al., 2018
In the citing paper
“It has long been recognised that both set (the mindset of the participant, including their expectations, assumptions and intentions for the psychedelic experience, as well as stable variables such as personality and the presence of psychopathology) and setting (the physical, social and cultural environment in which the experience occurs) have the potential to greatly impact the outcomes of the Psy”
From The psychological processes of classic psychedelics in the treatment of depression: a systematic review protocol (2022) · cites this paper as [43]
In the citing paper
“Contextual factors, such as the environment in which the experience takes place (setting), the mindset of the individual (set), and the support available after the experience (integration and setting), have a huge impact on the effects of psychedelics (85–88).”
From Potential therapeutic effects of an ayahuasca-inspired N,N-DMT and harmine formulation: a controlled trial in healthy subjects (2024) · cites this paper as [85]
In the citing paper
“Differences in set and setting, which involve factors such as opportunity for preparation, guidance and integration by a trained guide, have been extensively shown to greatly influence the acute psychedelic experience (136, 137).”
From Examining the Potential Synergistic Effects Between Mindfulness Training and Psychedelic-Assisted Therapy (2021) · cites this paper as [136]
In the citing paper
“Changes in the ratings of subjective measures that were observed in the present study are not necessarily related to a pharmacological effect of 5-MeO-DMT, but could have resulted from uncontrolled variables such as response expectancy of the participants prior to and after the session or the set and setting of drug administration (Carhart-Harris et al. 2018; Hartogsohn 2016).”
From Prospective examination of synthetic 5-methoxy-N,N-dimethyltryptamine inhalation: effects on salivary IL-6, cortisol levels, affect, and non-judgment (2020) · cites this paper as Carhart-Harris et al. 2018
Citations
Cites
Mediators and Mechanisms of Change in Psychotherapy Research
Kazdin, A. E. (2007) · Annual Review of Clinical Psychology · doi:10.1146/annurev.clinpsy.3.022806.091432 · Cited by 2,504 · cited 1×
“Therapeutic alliance is already known to be a major predictor of response in mental healthcare (Kazdin, 2007) and if the present thesis is correct, its influence is likely to be greater still in the context of psychedelics (see Carhart-Harris and Nutt, 2017).”
BackgroundGriffiths, R. R., Johnson, M. W., Carducci, M. A., Umbricht, A., Richards, W. A., Richards, B. D., Cosimano, M. P., & Klinedinst, M. A. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116675513 · Cited by 2,201 · cited 4×
“Indirect support for this may be found in the not inconsiderable (before-versus-after treatment) effects sizes observed in control conditions in recent double-blind randomised control trials of psilocybin for end-of-life distress, for example (Griffiths et al., 2016).”
BackgroundMethodInfluentialRoss, S., Bossis, A., Guss, J., Agin-Liebes, G., Malone, T., Cohen, B., Mennenga, S. E., Belser, A., Kalliontzi, K., Babb, J., et al. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116675512 · Cited by 1,698
Griffiths, R. R., Richards, W. A., McCann, U., & Jesse, R. (2006) · Psychopharmacology · doi:10.1007/s00213-006-0457-5 · Cited by 1,684 · cited 2×
“In model 1, it can be seen that: (a) feeling ready to ‘surrender’ to the experience, (b) having a clear intention for it, (c) having the experience in a therapeutic setting, and (d) taking a higher dose, are all predictive of having a certain kind of psychedelic experience which we label ‘peak’ – an intentionally secu…”
BackgroundCaspi, A., Hariri, A. R., Holmes, A., Uher, R., & Moffitt, T. E. (2010) · American Journal of Psychiatry · doi:10.1176/appi.ajp.2010.09101452 · Cited by 1,346
Human hallucinogen research: guidelines for safety
Johnson, M., Richards, W., & Griffiths, R. (2008) · Journal of Psychopharmacology · doi:10.1177/0269881108093587 · Cited by 1,203
Religions, Values, and Peak-Experiences
Jones, R. G., & Maslow, A. H. (1965) · Journal for the Scientific Study of Religion · doi:10.2307/1384286 · Cited by 949
Psilocybin occasioned mystical-type experiences: immediate and persisting dose-related effects
Griffiths, R. R., Johnson, M. W., Richards, W. A., Richards, B. D., McCann, U., & Jesse, R. (2011) · Psychopharmacology · doi:10.1007/s00213-011-2358-5 · Cited by 932
MacLean, K. A., Johnson, M. W., & Griffiths, R. R. (2011) · Journal of Psychopharmacology · doi:10.1177/0269881111420188 · Cited by 895
Roseman, L., Nutt, D. J., & Carhart-Harris, R. L. (2018) · Frontiers in Pharmacology · doi:10.3389/fphar.2017.00974 · Cited by 808
Self-citationSerotonin and brain function: a tale of two receptors
Carhart-Harris, R., & Nutt, D. (2017) · Journal of Psychopharmacology · doi:10.1177/0269881117725915 · Cited by 739
Self-citationThe Therapeutic Potential of Psychedelic Drugs: Past, Present, and Future
Carhart-Harris, R. L., & Goodwin, G. M. (2017) · Neuropsychopharmacology · doi:10.1038/npp.2017.84 · Cited by 706 · cited 5×
“…is that a careful and honest management of context may serve to minimise harm and maximise the considerable therapeutic potential of psychedelics (Carhart-Harris and Goodwin, 2017; CarhartHarris and Nutt, 2017), yielding a powerful treatment model with a compelling neuropsychological action that…”
BackgroundInfluentialSelf-citationCarbonaro, T. M., Bradstreet, M. P., Barrett, F. S., MacLean, K. A., Jesse, R., Johnson, M. W., & Griffiths, R. R. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116662634 · Cited by 596
Watts, R., Day, C., Krzanowski, J., Nutt, D., & Carhart-Harris, R. (2017) · Journal of Humanistic Psychology · doi:10.1177/0022167817709585 · Cited by 589
Self-citationHartogsohn, I. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116677852 · Cited by 483
Psilocybin-Occasioned mystical experiences in the treatment of tobacco addiction.
Garcia-Romeu, A., Griffiths, R., & Johnson, M. (2015) · Current Drug Abuse Reviews · doi:10.2174/1874473708666150107121331 · Cited by 476
Ego-dissolution and psychedelics: validation of the ego-dissolution inventory (EDI).
Nour, M. M., Evans, L., Nutt, D., & Carhart-Harris, R. L. (2016) · Frontiers in Human Neuroscience · doi:10.3389/fnhum.2016.00269 · Cited by 470
Self-citationHendricks, P. S., Thorne, C. B., Clark, C. B., Coombs, D. W., & Johnson, M. W. (2015) · Journal of Psychopharmacology · doi:10.1177/0269881114565653 · Cited by 410
Drug, Set, and Setting: The Basis for Controlled Intoxicant Use
Zentner, J. L. (1985) · JAMA · doi:10.1001/jama.1985.03350340121039 · Cited by 410
Prediction of Psilocybin Response in Healthy Volunteers
Studerus, E., Gamma, A., Kometer, M., & Vollenweider, F. X. (2012) · PLoS ONE · doi:10.1371/journal.pone.0030800 · Cited by 369
Barrett, F. S., Bradstreet, M. P., Leoutsakos, J.-M. S., Johnson, M. W., & Griffiths, R. R. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116678781 · Cited by 366 · cited 2×
“More specifically, whereas we saw a trend relationship between challenging experience under a psychedelic and less of an increase in psychological well-being 2 weeks later, others have found evidence that challenging experiences can be therapeutically beneficial (Barrett et al., 2016; Carbonaro et al., 2016).”
BackgroundPsychedelics not linked to mental health problems or suicidal behavior: A population study
Johansen, P.-Ø., & Krebs, T. S. (2015) · Journal of Psychopharmacology · doi:10.1177/0269881114568039 · Cited by 330
LSD enhances suggestibility in healthy volunteers
Carhart-Harris, R. L., Kaelen, M., Whalley, M. G., Bolstridge, M., Feilding, A., & Nutt, D. J. (2015) · Psychopharmacology · doi:10.1007/s00213-014-3714-z · Cited by 320
Self-citationThe hidden therapist: evidence for a central role of music in psychedelic therapy
Kaelen, M., Giribaldi, B., Raine, J., Evans, L., Timmermann, C., Rodriguez, N., Roseman, L., Feilding, A., Nutt, D., & Carhart-Harris, R. L. (2018) · Psychopharmacology · doi:10.1007/s00213-017-4820-5 · Cited by 303
Self-citationThe paradoxical psychological effects of lysergic acid diethylamide LSD
Carhart-Harris, R. L., Kaelen, M., Bolstridge, M., Williams, T. M., Williams, L. T., Underwood, R., Feilding, A., & Nutt, D. J. (2016) · Psychological Medicine · doi:10.1017/s0033291715002901 · Cited by 293
Self-citationLYSERGIC ACID DIETHYLAMIDE: SIDE EFFECTS AND COMPLICATIONS
COHEN, S. (1960) · The Journal of Nervous and Mental Disease · doi:10.1097/00005053-196001000-00005 · Cited by 287
Do the dissociative side effects of ketamine mediate its antidepressant effects?
Luckenbaugh, D. A., Niciu, M. J., Ionescu, D. F., Nolan, N. M., Richards, E. M., Brutsche, N. E., Guevara, S., & Zarate, C. A. (2014) · Journal of Affective Disorders · doi:10.1016/j.jad.2014.02.017 · Cited by 283
Psychedelics and connectedness
Carhart-Harris, R. L., Erritzøe, D., Haijen, E. C. H. M., Kaelen, M., & Watts, R. (2017) · Psychopharmacology · doi:10.1007/s00213-017-4701-y · Cited by 278
Self-citationREACTIONS TO PSILOCYBJN ADMINISTERED IN A SUPPORTIVE ENVIRONMENT
Leary, T., Litwin, G. H., & Metzner, R. (1963) · The Journal of Nervous and Mental Disease · doi:10.1097/00005053-196312000-00007 · Cited by 245
Storming Heaven: LSD and the American Dream
Stevens, J. (1987) · DigitalGeorgetown (Georgetown University Library) · Cited by 241
Carhart-Harris, R. L., Leech, R., Williams, T. M., Erritzoe, D., Abbasi, N., Bargiotas, T., Hobden, P., Sharp, D. J., Evans, J., Feilding, A., et al. (2012) · British Journal of Psychiatry · doi:10.1192/bjp.bp.111.103309 · Cited by 237
Self-citationAcid Dreams: The Complete Social History of LSD: The CIA, the Sixties, and Beyond
Lee, M. A., & Shlain, B. (1985) · Cited by 212
Alboni, S., van Dijk, R. M., Poggini, S., Milior, G., Perrotta, M., Drenth, T., Brunello, N., Wolfer, D. P., Limatola, C., Amrein, I., et al. (2017) · Molecular Psychiatry · doi:10.1038/mp.2015.142 · Cited by 207
Self-citationHarmer, C. J., & Cowen, P. J. (2013) · Philosophical Transactions of the Royal Society B Biological Sciences · doi:10.1098/rstb.2012.0407 · Cited by 197
Psychedelics in the treatment of unipolar mood disorders: a systematic review
Rucker, J., Jelen, L. A., Flynn, S. K., Frowde, K., & Young, A. H. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116679368 · Cited by 197
LSD enhances the emotional response to music
Kaelen, M., Barrett, F. S., Roseman, L., Lorenz, R., Family, N., Bolstridge, M., Curran, H. V., Feilding, A., Nutt, D., & Carhart-Harris, R. L. (2015) · Psychopharmacology · doi:10.1007/s00213-015-4014-y · Cited by 179
Self-citationAyahuasca Shamanism in the Amazon and Beyond
(2014) · Oxford University Press eBooks · doi:10.1093/acprof:oso/9780199341191.001.0001 · Cited by 174
Loizaga-Velder, A. K., & Verres, R. (2014) · Journal of Psychoactive Drugs · doi:10.1080/02791072.2013.873157 · Cited by 157
Drug Tourism or Spiritual Healing? Ayahuasca Seekers in Amazonia
Winkelman, M. (2005) · Journal of Psychoactive Drugs · doi:10.1080/02791072.2005.10399803 · Cited by 157
Branchi, I. (2011) · Psychoneuroendocrinology · doi:10.1016/j.psyneuen.2010.08.011 · Cited by 156
Self-citationRichards, W. A. (2015) · Columbia University Press eBooks · doi:10.7312/columbia/9780231174060.001.0001 · Cited by 149
Nettl, B. (1956) · Harvard University Press eBooks · doi:10.4159/harvard.9780674863408 · Cited by 149
Doctoring the Mind: Is Our Current Treatment of Mental Illness Really Any Good?
Bentall, R. P. (2020) · doi:10.18574/nyu/9780814791486.001.0001 · Cited by 134
Ashby, C. R., Edwards, E., & Wang, R. Y. (1994) · Synapse · doi:10.1002/syn.890170306 · Cited by 116
Cultural Determinants of Response to Hallucinatory Experience
Wallace, A. F. C. (1959) · Archives of General Psychiatry · doi:10.1001/archpsyc.1959.03590010074009 · Cited by 110
A Clinical Study of LSD Treatment in Alcoholism
Ludwig, A. M., Levine, J., Stark, L. H., & Lazar, R. (1969) · American Journal of Psychiatry · doi:10.1176/ajp.126.1.59 · Cited by 95
Jokela, M. M., Keltikangas‐Järvinen, L., Mika Kivimaki, B., Puttonen, S., Elovainio, M. J., Rontu, R., & Lehtimäki, T. J. (2007) · Archives of General Psychiatry · doi:10.1001/archpsyc.64.3.356 · Cited by 95
Efficacy and Enlightenment: LSD Psychotherapy and the Drug Amendments of 1962
Oram, M. (2014) · Journal of the history of medicine and allied sciences · doi:10.1093/jhmas/jrs050 · Cited by 93
Timmermann, C., Spriggs, M. J., Kaelen, M., Leech, R., Nutt, D., Moran, R., Carhart-Harris, R. L., & Muthukumaraswamy, S. D. (2017) · Neuropharmacology · doi:10.1016/j.neuropharm.2017.10.039 · Cited by 75
Self-citationThe placebo effect revisited: Lessons learned to date
Kirsch, I. (2013) · Complementary Therapies in Medicine · doi:10.1016/j.ctim.2012.12.003 · Cited by 73
Chiarotti, F., Viglione, A., Giuliani, A., & Branchi, I. (2017) · Translational Psychiatry · doi:10.1038/tp.2017.35 · Cited by 66
Self-citationJokela, M. M., Lehtimäki, T. J., & Keltikangas‐Järvinen, L. (2007) · American Journal of Medical Genetics Part B Neuropsychiatric Genetics · doi:10.1002/ajmg.b.30555 · Cited by 53
Tupper, K. W., & Labate, B. C. (2015) · Current Drug Abuse Reviews · doi:10.2174/1874473708666150107155042 · Cited by 48
Jokela, M. M., Lehtimäki, T. J., & Keltikangas‐Järvinen, L. (2007) · Behavior Genetics · doi:10.1007/s10519-007-9157-0 · Cited by 42
Neurotoxicity and LSD treatment: a follow-up study of 151 patients in Denmark
Larsen, J. K. (2016) · History of Psychiatry · doi:10.1177/0957154x16629902 · Cited by 29
(2016) · doi:10.5040/9798400696572 · Cited by 16
Lessons to be learned from early psychedelic therapy in Denmark
Erritzøe, D., & Richards, W. A. (2017) · Nordic Journal of Psychiatry · doi:10.1080/08039488.2017.1336252 · Cited by 14
de Ríos, M. D. (2009) · Cited by 14
Psilocybin: Psychotherapy or drug?
Goodwin, G. M. (2016) · Journal of Psychopharmacology · doi:10.1177/0269881116675757 · Cited by 12
Taking the depressed “person” into account before moving into personalized or precision medicine
Demyttenaere, K. (2016) · World Psychiatry · doi:10.1002/wps.20362 · Cited by 11
Second thoughts on psychedelic drugs
Novak, S. J. (1998) · Endeavour · doi:10.1016/s0160-9327(98)01096-5 · Cited by 9
Concerns regarding conclusions made about LSD-treatments (received 25 October 2016)
Erritzøe, D., Nutt, D., & Carhart-Harris, R. L. (2017) · History of Psychiatry · doi:10.1177/0957154x17692197 · Cited by 8
Self-citation
Research works printed but not linked: 10
- Aixala M, 2017, Psychotherapeutic Intervention in Integration of Difficult Psychedelic Experiences: The ICEERS Support Service
- Albarelli HP, 2009, A Terrible Mistake: The Murder of Frank Olson and the CIA’s Secret Cold War Experiments
- Hartogsohn I, 2015, The Psycho-Social Construction of LSD: How Set and Setting Shaped the American Psychedelic Experience 1950–1970
- Hartogsohn I, 2017, Drug Sci Pol Law, 3, 1
- Hofmann A, 1980, LSD: My Problem Child
- Krebs TS, 2012, J Psychopharmacol, 26, 994
- Lee MA, 1992, Acid Dreams: The Complete Social History of LSD, the CIA, the Sixties and Beyond
- Schwartz C (2017) Molly at the Marriott: Inside America’s Premier Psychedelics conference. The New York Times. Available at: https://www.nytimes.com/2017/05/06/style/psychedelic-drug-resurgence-daily-life.html (accessed 6 May 2017).
- Sos P, 2013, Neuro Endocrinol Lett, 34, 287
- Waldman A, 2017, A Really Good Day: How Microdosing Made a Mega Difference in My Mood, My Marriage, and My Life
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Self-citationMadsen, M. K., Fisher, P. M., Burmester, D., Dyssegaard, A., Stenbæk, D. S., Kristiansen, S., Johansen, S. S., Lehel, S., Linnet, K., Svarer, C., et al. (2019) · Neuropsychopharmacology · doi:10.1038/s41386-019-0324-9 · Cited by 517
Metadata
- Authors
- Carhart-Harris, R. L., Roseman, L., Haijen, E., Erritzoe, D., Watts, R., Branchi, I., & Kaelen, M.
- Affiliations
- Imperial College London (GB)
- Psychedelic Research Group, Neuropsychopharmacology Unit, Centre for Psychiatry, Division of Brain Sciences, Department of Medicine, Imperial College London, London, UK
- Istituto Superiore di Sanità (IT)
- Corresponding author
- Carhart-Harris, Robin L
- Venue
- Journal of Psychopharmacology
- Publisher
- SAGE Publications
- Published
- 2018-02-15
- Volume
- 32
- Issue
- 7
- Pages
- 725-731
- ISSN
- 0269-8811 (ISSN-L)
- 1461-7285
- OpenAlex
- W2788854095
- Cited by
- 657
- References
- 62
- Citations by year
- 2026: 83 · 2025: 102 · 2024: 112 · 2023: 105 · 2022: 97 · 2021: 72 · 2020: 49 · 2019: 24 · 2018: 13
- FWCI
- 46.42
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Psychopharmacology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute for Health and Care Research (ACF-2013-21-501)
- Topics
- Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
- Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
- Social Sciences › Health › Religion, Spirituality, and Psychology
- Keywords
- psychedelics, set and setting, context effects, 5-HT2A receptor agonism, neuroplasticity, long-term mental health outcomes, harm reduction
- MeSH terms
- Animals, Clinical Trials as Topic, Hallucinogens, Humans, Research Design, Serotonin 5-HT2 Receptor Agonists
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