January 15, 2026
Benjamin Kelmendi, Thomas G. Adams, Terence H. W. Ching et al.
preprint
Background: Obsessive-compulsive disorder (OCD) affects 2-3% of the population worldwide. 40-60% of patients do not respond to first-line interventions. We evaluated the efficacy and safety of a single dose of psilocybin in patients with treatment-resistant OCD.Methods: In this phase 2, randomized, double-blind trial, we randomly assigned 28 adults with treatment-resistant OCD to receive a...
2026
Yosr Ziadi, Taehwan Park
preprint
Conference poster presented at ISPOR 2026, Philadelphia, May 2026. Co-authors: Yosr Ziadi, Taehwan Park. St. John's University.
2026
Tom Bielen
preprint
Psilocybin-assisted therapy has produced promising results in clinical trials for depression, but most existing reviews treat major depressive disorder (MDD) and treatment-resistant depression (TRD) as a single category. This conflation is a problem. MDD and TRD differ in diagnostic criteria, illness severity, prior treatment failure, and likely neurobiological profile. Pooling their results...
2026
Irina Dell'Orto
preprint
Background: Psilocybin-assisted therapy (PAT) has demonstrated rapid and substantial antidepressant effects in phase 2 RCTs (Davis et al., 2021; Carhart-Harris et al., 2021), and phase 3 trials are now active (Usona uAspire, NCT06308653). However, three critical gaps remain unresolved in 2025: (1) the durability of effects beyond 12 months has not been established in a controlled design; (2)...
2026
Canyon Akromis, Lorraine Li, Kwon Mok Ko et al.
preprint
This project is a secondary analysis of data from Psilocybin in Depression Resistant to Standard Treatments (PsiDeR) study, a phase II, randomised, placebo-controlled clinical trial where participants with treatment resistant depression received either 25 mg of psilocybin or a placebo alongside psychotherapy. This research seeks to determine whether the therapeutic alliance, measured by the...
Advances in experimental medicine and biology
2026
Berend Olivier, Jocelien D A Olivier
Major depressive disorder (MDD), including treatment-resistant depression (TRD), is a highly prevalent psychiatric disorder. MDD is associated with severe suffering, burden and large economical costs. Although various conventional antidepressant treatments are available, a large portion of depressed people does not or not adequately respond to the first-line treatments (mostly SSRIs and SNRIs)...
Frontiers in Psychiatry
2026
Sofia Abramsky-Sze, Elliot Marseille, Richard Matzopoulos et al.
correction
[This corrects the article DOI: 10.3389/fpsyt.2025.1508811.].
Medicinska istrazivanja
2026
Stefan Jerotić, Olga Čolović, Nađa Marić
Psychedelic-assisted psychotherapy (PAP) is emerging as a novel intervention for major psychiatric disorders, most notably major depressive disorder (MDD) and post-traumatic stress disorder (PTSD). While psychotherapy is widely regarded as a core element of PAP its precise role remains poorly defined. This narrative review traces the development of PAP within contemporary Western psychiatry,...
Genetics and Molecular Research
2026
Mahvash Khan, Muhammad Omar Malik, Sara Sajjad et al.
Background: Major depressive disorder is a prevalent psychological condition that is characterized by sustained low mood, dysfunction and biological dysregulation. Depression can be treated with cognitive behavioral therapy, and newer studies indicate that psilocybin-based therapy may improve depressive symptoms when used under supervised psychological support. Oxytocin, a neuropeptide that...
Online Publication Service of Würzburg University (Würzburg University)
2026
Katja Ehrmann
Obsessive Compulsive Disorder (OCD) is a prevalent mental disorder, with a lifetime prevalence of 2-3%, characterized by intrusive thoughts (obsessions) and repetitive behaviors (compulsions). These thoughts and behaviors take up a significant amount of time, cause immense distress, and compromise the quality of life of those who suffer from OCD. In addition to psychological factors such as...