Skip to content

Andy Meijer

3 papers in the library · 9 citations · publishing 2025-2026

Papers

Sort Most recent Most cited

Long-Term Efficacy of Psilocybin with Adjunct Psychotherapy in Treatment-Resistant Major Depression (EPIsoDE): 6- and 12-Month Naturalistic Follow-Up of a Phase 2b Trial.

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...

Efficacy and Safety of Psilocybin in Treatment-Resistant Major Depression

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...

Common factors in altered states: Understanding psychedelic therapy through the lens of Grawe's general change mechanisms.

Psychological review November 1, 2025 Max Wolff, Hans Rutrecht, Lea J. Mertens et al.

Psychedelic therapy is commonly understood as a form of psychotherapy. However, despite promising results from clinical trials, scientific progress has been hindered by a lack of theoretical integration between the fields of psychedelic and psychotherapy research. This article seeks to bridge this divide by outlining a transtheoretical understanding of psychedelic-occasioned psychological...