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Papers on “psilocybin psychedelic-assisted therapy depression randomized controlled trial”

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1. The entropic brain: a theory of conscious states informed by neuroimaging research with psychedelic drugs

   Robin Carhart‐Harris, Robert Leech, Peter J. Hellyer, et al. · 2014 · Frontiers in Human Neuroscience · 1,312 cites

   Entropy is a dimensionless quantity that is used for measuring uncertainty about the state of a system but it can also imply physical qualities, where high entropy is synonymous with high disorder. Entropy is applied here in the context of states of consciousness and their associated neurodynamics, with a particular focus on the psychedelic state. The psychedelic state is considered an exemplar of a primitive or primary state of consciousness that preceded the development of modern, adult, human, normal waking consciousness. Based on neuroimaging data with psilocybin, a classic psychedelic drug, it is argued that the defining feature of "primary states" is elevated entropy in certain aspects

2. Effects of Psilocybin-Assisted Therapy on Major Depressive Disorder

   Alan K. Davis, Frederick S. Barrett, Darrick G. May, et al. · 2020 · JAMA Psychiatry · 1,309 cites

   Importance: Major depressive disorder (MDD) is a substantial public health burden, but current treatments have limited effectiveness and adherence. Recent evidence suggests that 1 or 2 administrations of psilocybin with psychological support produces antidepressant effects in patients with cancer and in those with treatment-resistant depression. Objective: To investigate the effect of psilocybin therapy in patients with MDD. Design, Setting, and Participants: This randomized, waiting list-controlled clinical trial was conducted at the Center for Psychedelic and Consciousness Research at Johns Hopkins Bayview Medical Center in Baltimore, Maryland. Adults aged 21 to 75 years with an MDD diagno

3. REBUS and the Anarchic Brain: Toward a Unified Model of the Brain Action of Psychedelics

   Robin Carhart‐Harris, Karl Friston · 2019 · Pharmacological Reviews · 1,213 cites

   This paper formulates the action of psychedelics by integrating the free-energy principle and entropic brain hypothesis. We call this formulation relaxed beliefs under psychedelics (REBUS) and the anarchic brain, founded on the principle that—via their entropic effect on spontaneous cortical activity—psychedelics work to relax the precision of high-level priors or beliefs, thereby liberating bottom-up information flow, particularly via intrinsic sources such as the limbic system. We assemble evidence for this model and show how it can explain a broad range of phenomena associated with the psychedelic experience. With regard to their potential therapeutic use, we propose that psychedelics wor

4. Single-Dose Psilocybin for a Treatment-Resistant Episode of Major Depression

   Guy M. Goodwin, Scott T. Aaronson, Oscar Alvarez, et al. · 2022 · New England Journal of Medicine · 1,148 cites

   BACKGROUND: Psilocybin is being studied for use in treatment-resistant depression. METHODS: In this phase 2 double-blind trial, we randomly assigned adults with treatment-resistant depression to receive a single dose of a proprietary, synthetic formulation of psilocybin at a dose of 25 mg, 10 mg, or 1 mg (control), along with psychological support. The primary end point was the change from baseline to week 3 in the total score on the Montgomery-Åsberg Depression Rating Scale (MADRS; range, 0 to 60, with higher scores indicating more severe depression). Secondary end points included response at week 3 (≥50% decrease from baseline in the MADRS total score), remission at week 3 (MADRS total sco

5. Psilocybin with psychological support for treatment-resistant depression: six-month follow-up

   Robin Carhart‐Harris, Mark Bolstridge, Camilla Day, et al. · 2017 · Psychopharmacology · 992 cites

   RATIONALE: Recent clinical trials are reporting marked improvements in mental health outcomes with psychedelic drug-assisted psychotherapy. OBJECTIVES: Here, we report on safety and efficacy outcomes for up to 6 months in an open-label trial of psilocybin for treatment-resistant depression. METHODS: Twenty patients (six females) with (mostly) severe, unipolar, treatment-resistant major depression received two oral doses of psilocybin (10 and 25 mg, 7 days apart) in a supportive setting. Depressive symptoms were assessed from 1 week to 6 months post-treatment, with the self-rated QIDS-SR16 as the primary outcome measure. RESULTS: Treatment was generally well tolerated. Relative to baseline, m

6. Rapid antidepressant effects of the psychedelic ayahuasca in treatment-resistant depression: a randomized placebo-controlled trial

   Fernanda Palhano-Fontes, Dayanna Barreto, Heloisa Onias, et al. · 2018 · Psychological Medicine · 841 cites

   BACKGROUND: Recent open-label trials show that psychedelics, such as ayahuasca, hold promise as fast-onset antidepressants in treatment-resistant depression. METHODS: To test the antidepressant effects of ayahuasca, we conducted a parallel-arm, double-blind randomized placebo-controlled trial in 29 patients with treatment-resistant depression. Patients received a single dose of either ayahuasca or placebo. We assessed changes in depression severity with the Montgomery-Åsberg Depression Rating Scale (MADRS) and the Hamilton Depression Rating scale at baseline, and at 1 (D1), 2 (D2), and 7 (D7) days after dosing. RESULTS: We observed significant antidepressant effects of ayahuasca when compare

7. Quality of Acute Psychedelic Experience Predicts Therapeutic Efficacy of Psilocybin for Treatment-Resistant Depression

   Leor Roseman, David Nutt, Robin Carhart‐Harris · 2018 · Frontiers in Pharmacology · 827 cites

   Introduction: It is a basic principle of the ‘psychedelic’ treatment model that the quality of the acute experience mediates long-term improvements in mental health. In the present paper we sought to test this using data from a clinical trial assessing psilocybin for treatment-resistant depression (TRD). In line with previous reports, we hypothesized that the occurrence and magnitude of Oceanic Boundlessness (OBN) (sharing features with mystical-type experience) and Dread of Ego Dissolution (DED) (similar to anxiety) would predict long-term positive outcomes, whereas sensory perceptual effects would not. Material and Methods: Twenty patients with treatment resistant depression underwent trea

8. The Therapeutic Potential of Psychedelic Drugs: Past, Present, and Future

   Robin Carhart‐Harris, Guy M. Goodwin · 2017 · Neuropsychopharmacology · 705 cites