npj Mental Health Research
July 10, 2026
Constantin Volkmann, Michael Seitz, Ricarda Evens et al.
Psychedelics may influence personality traits, but longitudinal evidence on first-time use outside clinical settings remains limited. We followed 102 first-time psychedelic users and 1066 never-users over one year among Berlin university students. Personality was assessed with the Big Five Inventory at baseline and follow-up. Linear mixed-effects models showed small relative increases in...
Psychotherapy and Psychosomatics
May 27, 2026
Lea J. Mertens, Felix Betzler, Manuela Brand et al.
Psilocybin shows promise for treatment-resistant depression (TRD), but long-term data are limited. This study examined the antidepressant effect of one or two psilocybin doses with adjunct psychotherapy in TRD until twelve months. This is a naturalistic follow-up of a phase 2b, randomized, active placebo-controlled trial, where participants were randomized to receive two drug administrations...
Journal of psychopharmacology (Oxford, England)
May 1, 2026
Grace Viljoen, Henrik Walter, Antonia Bendau et al.
3 citations
Psychedelic-assisted therapy (PAT) has demonstrated substantial efficacy across a range of mental disorders. However, heterogeneity between patients confers differential responsiveness. This systematic review aims to explore factors which may predict therapeutic responses to PAT. A systematic search was performed from inception through to March 2024 and studies that assessed predictors of...
JAMA Psychiatry
March 18, 2026
Lea J. Mertens, Michael Koslowski, Felix Betzler et al.
9 citations
Importance: Psilocybin shows promise in treating depression, although limitations of previous research warrant further research. Objective: To investigate the efficacy and safety of oral psilocybin, 25 mg, with adjunct psychotherapy in treatment-resistant depression (TRD). Design, Setting, and Participants: This was a 2-center, triple-blinded (investigator, participant, rater), phase 2b, active...
Nervenheilkunde
February 1, 2026
Dimitris Repantis, Michael Koslowski, Felix Betzler et al.
Zusammenfassung Psychedelika wie Psilocybin und LSD durchlaufen eine bemerkenswerte Geschichte, die von frühen psychiatrischen Anwendungen über den Freizeitgebrauch und die Prohibition in den 70er Jahre bis zur aktuellen Wiederentdeckung in klinischen Studien reicht. MDMA wird seit etwa 15 Jahren für die Behandlung der posttraumatischen Belastungsstörung evaluiert. In der Behandlung werden...
Psychedelic Harm Reduction
2026
Michael Koslowski, Peter Gasser
6 citations
Psychedelic substances have gained recognition for their therapeutic potential, but they also present challenges, with individuals occasionally experiencing distressing episodes referred to as challenging experiences or, in the recreational setting, “bad trips”. Trial therapists and physicians, but also healthcare professionals in emergency rooms, need a comprehensive strategy to effectively...
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...
Die Psychotherapie
February 9, 2024
Dimitris Repantis, Michael Koslowski, Sascha Benjamin Fink
4 citations
Zusammenfassung Hintergrund In den letzten Jahren wurde die klinische Forschung zu Psychedelika-gestützter Therapie psychischer Störungen wieder aufgenommen, mit einer stetig steigenden Zahl von Studien und Publikationen. Dabei sind viele ethische Fragen aufgekommen, die noch nicht ausreichend untersucht und beantwortet wurden. Ziel Dieser Beitrag gibt einen Überblick zum Stand der klinischen...
Frontiers in Human Neuroscience
February 16, 2023
Michael Koslowski, Max-Pelgrom de Haas, Tamara Fischmann
14 citations
Dreams are still an enigma of human cognition, studied extensively in psychoanalysis and neuroscience. According to the Freudian dream theory and Solms' modifications of the unconscious derived from it, the fundamental task of meeting our emotional needs is guided by the principle of homeostasis. Our innate value system generates conscious feelings of pleasure and unpleasure, resulting in the...
Neuroscience Applied
2022
Lea J. Mertens, Michael Koslowski, Felix Betzler et al.
40 citations
Psychedelics such as psilocybin have recently gained remarkable interest in both the specialist literature and the lay press because studies suggest that these substances may have great therapeutic potential in various psychiatric disorders, including major depression. However, clinical trials with psychedelic drugs pose particular methodological challenges to researchers, some of which differ...
2021
Felix Betzler, Gerhard Gründer, Matthew W. Johnson et al.
Purpose of Review: The use of psychedelics in a therapeutical setting has been reported for the treatment of various diagnoses in recent years. However, as psychedelic substances are still commonly known for their ( illicit) recreational use, it may seem counterintuitive to use psychedelic therapy to treat substance use disorders. This review aims to discuss how psychedelics can promote and...
Frontiers in Psychiatry
February 21, 2020
Max Wolff, Ricarda Evens, Lea J. Mertens et al.
188 citations
The efficacy of psychedelic-assisted therapies for mental disorders has been attributed to the lasting change from experiential avoidance to acceptance that these treatments appear to facilitate. This article presents a conceptual model that specifies potential psychological mechanisms underlying such change, and that shows substantial parallels between psychedelic therapy and cognitive...