Psychedelic Medicine
May 16, 2025
Roland R. Griffiths, William A. Richards, Robert L. Jesse et al.
14 citations
Background: Although historical writings, anthropological accounts, and experimental studies document associations between psilocybin use and religion, no prospective experimental study has investigated how the effects of psilocybin are experienced and interpreted by religious clergy. This exploratory study evaluated the overall safety and the acute and enduring effects of psilocybin in clergy....
Journal of Psychoactive Drugs
February 13, 2025
Yitong Xin, Roland R. Griffiths, Alan K. Davis
1 citation
An interesting aspect of entity encounters during psychedelic experiences is their ability to transform one's religious beliefs. However, little is known about sex differences in these transformations. This study investigates sex differences in changes in religious beliefs before and after an entity encounter among ayahuasca users. Data were collected via an anonymous Internet-based survey (N =...
Psychedelic Medicine
January 20, 2025
Marianna Graziosi, Gabrielle Agin-Liebes, Mary P Cosimano et al.
9 citations
Introduction: Serotonergic psychedelics, serotonin 2A receptor agonists such as psilocybin that can result in substantially altered states of consciousness, are used in recreational and research settings. The safety of psychedelic experiences in research settings is supported by controlled physical environments, presence of clinical and medical staff to address emergent issues, screening for...
Nature Mental Health
October 7, 2024
Petros Petridis, Jack Grinband, Gabrielle Agin-Liebes et al.
10 citations
Psilocybin-assisted psychotherapy (PAP) has shown promise in treating mood and anxiety disorders in patients with cancer. However, patients with cancer often suffer from more than just depression and anxiety, and so far, PAP's effect on other psychiatric symptoms remains largely unknown. To address this gap, we pooled previously unpublished data from two phase II, randomized, placebo-controlled...
Philosophical Perspectives on Psychedelic Psychiatry
September 13, 2024
David B. Yaden, Sandeep M. Nayak, Roland R. Griffiths
4 citations
Abstract The proportion of people who change their metaphysical beliefs after psychedelic experiences is not yet known with specificity. However, it appears that belief changes can occur in some cases, and evidence more precisely estimating the prevalence and magnitude of such belief changes is accruing. The evidence for metaphysical belief changes is reviewed and the potential psychological...
Journal of Psychoactive Drugs
May 7, 2024
Sandeep M. Nayak, Sydney H White, Samantha Hilbert et al.
18 citations
Recent studies suggest psychedelic use may be associated with changes in a variety of beliefs or belief-like states, including increased 1) mind perception, 2) non-naturalistic beliefs, and 3) Atheist-Believer status (e.g. believer, agnostic, or nonbeliever). We conducted a prospective longitudinal study among participants (N = 657) who planned to have a psilocybin experience outside a...
PLoS One
March 14, 2024
Adam W. Levin, Rafaelle Lancelotta, Nathan D. Sepeda et al.
65 citations
We examined if the therapeutic alliance between study participants and intervention facilitators in a psilocybin-assisted therapy (PAT) trial changed over time and whether there were relationships between alliance, acute psilocybin experiences, and depression outcomes. In a randomized, waiting list-controlled clinical trial for major depressive disorder in adults ( N = 24), participants were...
Psychological review
March 1, 2024
Manoj K. Doss, Jason Samaha, Frederick S. Barrett et al.
24 citations
Despite distinct classes of psychoactive drugs producing putatively unique states of consciousness, there is surprising overlap in terms of their effects on episodic memory and cognition more generally. Episodic memory is supported by multiple subprocesses that have been mostly overlooked in psychopharmacology and could differentiate drug classes. Here, we reanalyzed episodic memory confidence...
Psychedelic Medicine
February 28, 2024
Dana D. DiRenzo, Jamie Perin, Erika Darrah et al.
4 citations
This preliminary study suggests that a transient increase in cytokine production ≤1-week postpsilocybin may be found, although not consistently across patient populations. More broadly, peripheral cytokine production is possibly altered by psilocybin administration. ClinicalTrials.gov Identifier: NCT01988311.
Frontiers in Psychiatry
September 19, 2023
Hillary Jackson, Sara So, Abigail Yaffe et al.
87 citations
Introduction The classic psychedelic psilocybin, found in some mushroom species, has received renewed interest in clinical research, showing potential mental health benefits in preliminary trials. Naturalistic use of psilocybin outside of research settings has increased in recent years, though data on the public health impact of such use remain limited. Methods This prospective, longitudinal...
JAMA
August 31, 2023
Charles L. Raison, Gerard Sanacora, Joshua Woolley et al.
493 citations
Importance Psilocybin shows promise as a treatment for major depressive disorder (MDD). Objective To evaluate the magnitude, timing, and durability of antidepressant effects and safety of a single dose of psilocybin in patients with MDD. Design, Setting, and Participants In this phase 2 trial conducted between December 2019 and June 2022 at 11 research sites in the US, participants were...
Psychedelic Medicine
August 30, 2023
Samantha Hilbert, David S. Mathai, Nathan D. Sepeda et al.
10 citations
This analysis suggests the utility of exploring clinical applications of dissociatives that occur within the supportive contexts that are characteristic of psychedelic research and that prioritize the optimization of psychologically valuable drug experiences. This study was registered with ClinicalTrials.gov (NCT02033707).
Psychiatry Research
July 23, 2023
Otto Simonsson, Per Carlbring, Robin Carhart-Harris et al.
24 citations
We conducted a meta-analysis using individual participant data from three, two-dose psilocybin trials for depression (N = 102) with the aim of assessing the risk of symptom worsening. Clinically significant symptom worsening occurred for a minority of participants in the psilocybin and escitalopram conditions (∼10%) and for a majority of participants in the waitlist condition (63.6%). Using...
Journal of Psychoactive Drugs
July 14, 2023
Christopher Timmermann, Aki Nikolaidis, Alan K. Davis et al.
4 citations
This study translated and tested the psychometric properties of acute psychedelic effects measures among Spanish-speaking people. The Psychological Insight Questionnaire (PIQ), Challenging Experiences Questionnaire (CEQ), and Mystical Experiences Questionnaire (MEQ) were translated before being incorporated into a web-based survey. We recruited native Spanish-speakers (N = 442; Mage = 30.8, SD...
June 9, 2023
Sandeep M. Nayak, Sydney H White, Samantha Hilbert et al.
1 citation
preprint
Recent studies suggest psychedelic use may be associated with changes in a variety of beliefs or belief-like states, including increased 1) mind perception, 2) non-naturalistic beliefs, and 3) Atheist-Believer status (e.g., believer, agnostic, or non-believer). We conducted a prospective longitudinal study among participants (N = 657) who planned to have a psychedelic experience. We asked...
Journal of Psychopharmacology
June 8, 2023
Natalie Gukasyan, Roland R. Griffiths, David B. Yaden et al.
60 citations
Background: Psilocybin is being studied for depression, but little is known about how it interacts with common antidepressants. Limited data suggest that psilocybin’s effects may be diminished by serotonergic antidepressants acutely and even after a medication washout period. Aims: To learn the extent to which antidepressants may diminish the effects of psilocybin-containing mushrooms both...
Neuroimage
May 4, 2023
Andrew Gaddis, Daniel E. Lidstone, Mary Beth Nebel et al.
correction
Corrigendum to 'Psilocybin induces spatially constrained alterations in thalamic functional organizaton and connectivity': Neuroimage 2022 Oct 15;260:119434.
Psychedelic Med (New Rochelle)
March 13, 2023
Peter S. Hendricks, Charles D. Nichols, Kathryn A. Cunningham et al.
7 citations
Past, Present, and Future of Psychedelics: A Psychedelic Medicine Roundtable Discussion.
Journal of psychopharmacology (Oxford, England)
2023
Sandeep M. Nayak, Manvir Singh, David B. Yaden et al.
87 citations
Psychedelic use is anecdotally associated with belief changes, although few studies have tested these claims. Characterize a broad range of psychedelic occasioned belief changes. A survey was conducted in 2374 respondents who endorsed having had a belief changing psychedelic experience. Participants rated their agreement with belief statements Before and After the psychedelic experience as well...
JAMA Psychiatry
2023
Brian D Kiluk, Bethea A Kleykamp, Sandra D Comer et al.
22 citations
Novel treatments for opioid use disorder (OUD) are needed to address both the ongoing opioid epidemic and long-standing barriers to existing OUD treatments that target the endogenous μ-opioid receptor (MOR) system. The goal of this review is to highlight unique clinical trial design considerations for the study of emerging treatments for OUD that address targets beyond the MOR system. In...
Journal of Psychoactive Drugs
2023
Julian Urrutia, Brian T Anderson, Sean J Belouin et al.
21 citations
As individuals and communities around the world confront mounting physical, psychological, and social threats, three complimentary mind-body-spirit pathways toward health, wellbeing, and human flourishing remain underappreciated within conventional practice among the biomedical, public health, and policy communities. This paper reviews literature on psychedelic science, contemplative practices,...
J Affect Disord
December 27, 2022
Aki Nikolaidis, Rafaelle Lancelotta, Natalie Gukasyan et al.
24 citations
BackgroundSubjective experiences seem to play an important role in the enduring effects of psychedelic experiences. Although the importance of the subjective experience on the impact of psychedelics is frequently discussed, a more detailed understanding of the subtypes of psychedelic experiences and their associated impacts on mental health has not been well documented.MethodsIn the current...
Current Psychiatry Reports
December 1, 2022
Natalie Gukasyan, Colleen C Schreyer, Roland R. Griffiths et al.
29 citations
A growing body of research suggests psychedelic-assisted therapy (PAT) may be safe and effective for a variety of mental health conditions. Among these, eating disorders have been a recent target of interest. This review provides an up-to-date summary of the potential mechanisms and use of PAT in people diagnosed with eating disorders, with a focus on anorexia nervosa. Classic psychedelics may...
October 28, 2022
Natalie Gukasyan, Roland R. Griffiths, David B. Yaden et al.
1 citation
preprint
Background: Psilocybin is being studied for depression, but little is known about how it interacts with common antidepressants. Limited data suggests that psilocybin’s effects may be diminished by serotonergic antidepressants acutely and even after a medication washout period.Aims: To learn the extent to which serotonergic antidepressants may diminish psilocybin’s effects both concurrently and...
Neuroimage
October 15, 2022
Andrew Gaddis, Daniel E. Lidstone, Mary Beth Nebel et al.
38 citations
Classic psychedelics, such as psilocybin and LSD, and other serotonin 2A receptor (5-HT2AR) agonists evoke acute alterations in perception and cognition. Altered thalamocortical connectivity has been hypothesized to underlie these effects, which is supported by some functional MRI (fMRI) studies. These studies have treated the thalamus as a unitary structure, despite known differential 5-HT2AR...