The letter addresses critical issues in the methodology and conclusions of the meta-analysis, including inconsistencies in study design, methodological flaws in comparing correlation coefficients, and discrepancies in reported results and their interpretation. It contributes significantly to the ongoing discussion on psychedelic-assisted therapies and highlights the need for more standardized...
This response addresses methodological concerns raised regarding our meta-analysis of subjective effects and therapeutic outcomes following ketamine and psilocybin treatment. We discuss the potential influence of psychotherapy and differences in subjective-effect questionnaires across studies, acknowledging these as important limitations. We argue that these factors may partly explain observed...
High ventilation breathwork (HVB) can induce altered states of consciousness with phenomenological similarities to those reported following administration of serotonergic psychedelics such as lysergic acid diethylamide (LSD), psilocybin or ayahuasca. Non-pharmacological methods capable of reliably eliciting such states may provide scalable models for investigating therapeutic mechanisms...
Cluster B personality disorders (PDs) are highly comorbid with depression and are associated with attenuated antidepressant response. No clinical trials to date have reported on psilocybin-assisted psychotherapy (PAP) in comorbid treatment-resistant depression (TRD) and PDs. This is the first clinical trial to describe a subgroup of ten participants with a comorbid PD ( n = 9 cluster B; n = 1...
Abstract This observational survey study investigated the relationship between prior ayahuasca experience and mental health and mindset outcomes. Participants planning to attend an ayahuasca ceremony completed a survey before their upcoming ayahuasca use. Measures included substance use, depression, anxiety, stress, spiritual well-being, aberrant salience, and metaphysical beliefs. Participants...
Abstract Psychiatric trials typically define success as symptom reduction, yet patients prioritize meaning, vitality, and functioning. This imbalance undervalues experiential benefits, distorting clinical, policy, and FDA decisions. Psychedelic trials illustrate this, where robust well-being gains sometimes accompany modest symptom effects. We argue well-being should be elevated to co-primary...
Abstract Research examining psychological outcomes following psychedelic use has grown substantially, yet the role of childhood trauma in shaping these responses remains insufficiently understood. This scoping review mapped the literature examining childhood trauma in relation to post-psychedelic psychological outcomes. Thirty-four sources met inclusion criteria and investigated substances...
This scoping review maps literature for use of ketamine or esketamine with psychotherapy for depression or depressive symptoms. Forty-seven studies were identified including 4/47 (9%) randomized controlled trials, 4/47 (9%) open label trials, 27/47 (57%) observational or retrospective studies, and 12/47 (26%) individual case reports. Studies were categorized as Ketamine/Esketamine Combined with...
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...
Anxiety, depression, and stress are common in individuals with diabetes and cancer and are associated with poor self-management and well-being. Cognitive behavioral therapy (CBT) and mindfulness-based interventions (MBIs) are widely used in nonpharmacological treatments, but their comparative effectiveness remains unclear. We conducted a stratified subgroup meta-analysis to indirectly compare...
Depressive disorders are characterized by persistent negative affect, rumination, and impaired emotion regulation, contributing substantially to global disease burden. As recurrent rumination and negative attentional biases are central cognitive mechanisms of depression, interventions targeting these processes have gained increasing attention. Mindfulness-based interventions (MBIs) effectively...
Mindfulness-based interventions (MBIs) are recognised as effective psychosocial strategies for managing stress. We conducted a systematic review and meta-analysis of studies published up to August 2025 across the Web of Science, PubMed, Scopus, PsycINFO, EBSCO and Google Scholar following the PRISMA guidelines. Seventeen randomised controlled trials (n = 1,641) met the inclusion criteria....
Magnesium-ibogaine, a formulation combining ibogaine with pre- and post-treatment magnesium, was recently found to yield rapid clinical improvements in U.S. Special Operations veterans with TBI and PTSD. Yet, its therapeutic phenomenology during such healing is unknown. We analyzed post-session narratives from 30 male veterans who, after a single open-label magnesium-ibogaine treatment,...
Psychedelic substances are increasingly recognized for their potential to catalyse transformative shifts in worldviews. Central to these transformations may be the integration of self-transcendent states. This mixed-methods study explored transformative psychedelic experiences, focussing on subsequent epistemic shifts. Ninety participants completed the Awe Experience Scale (AWE-S), and the...
The pandemic has exacerbated mental health issues across the world. The limited availability of mental health professionals is preventing many from seeking help, which highlights the need for easily available mental health care routines like yoga, breathing, and meditation. A breath-based meditation technique known as Sudarshan Kriya Yoga (SKY) harnesses the power of breath to induce deep...
Internet gaming disorder (IGD) is recognized as a mental health issue. Traditional interventions have limitations, but mindfulness meditation (MM) shows promise due to its flexibility and social acceptance. Study 1, fMRI data from 61 IGD patients and 60 healthy controls (HCs) were compared to assess functional connectivity (FC). Study 2- a randomized clinical trial, 80 IGD patients underwent...
Posttraumatic stress disorder (PTSD) is associated with poor hippocampal function and disrupted pattern recognition. Cannabis use is highly prevalent in individuals with PTSD, yet the impact on these cognitive functions is poorly understood. Participants (n = 111) with a range of PTSD symptoms with and without regular cannabis use completed the mnemonic similarity task. We hypothesized that...
Psychedelic therapy has the potential to become a revolutionary and transdiagnostic mental health treatment, yielding enduring benefits that are often attributed to the experiences that coincide with peak psychedelic effects. However, there may be an underrecognized temporal structure to this process that helps explain why psychedelic and related altered states of consciousness can have an...
There is some evidence that the subjective effects of ketamine and other psychedelics like psilocybin are crucial for their therapeutic outcomes, such as treatment of depression or substance use disorder (SUD). We performed a meta-analysis and systematic review on the correlation of subjective symptoms and dissociation versus ketamine-induced therapeutic outcomes in patients with depression or...
Pre-prohibition psychedelic research with complex psychiatric patients generated a wealth of treatment methodologies and practices, providing invaluable clinical insights pertaining to the medical administration of psychedelics in various mental health diagnoses. Building upon these early studies, which lack the rigor and research tools available today, contemporary psychedelic research has...
Given the renewed interest in the use of psychedelics for the treatment of mental and substance use disorders in recent decades, there has also been renewed discussion and debate about whether it is necessary or beneficial for those who study and deliver psychedelic-assisted psychotherapy (PAP) to have had personal experience of using psychedelics. This paper provides a brief history of this...
Psilocybin is a serotonergic psychedelic shown to have enduring antidepressant effects. Currently, the mechanism for its enduring effects is not well understood. Empathy and prosocial behavior may be important for understanding the therapeutic benefit of psilocybin. In this article we review the effect of psilocybin on empathy and prosocial behavior. Moreover, we propose that psilocybin may...
The recent years have seen an unprecedented surge of psychedelic research. Studies with psilocybin (colloquially known as magic mushrooms), in particular, have shown promise in ameliorating symptoms of treatment-refractory depression, anxiety, and substance use disorder, among others 1 , 2 . Microdosing, the practice of regularly taking roughly a tenth of full psychedelic doses, is becoming...
Digital interventions have the potential to alleviate mental health disparities for marginalized and minoritized communities. The current study examined whether disparities in access and utilization of meditation in the United States (US) were reduced for a freely available meditation app. We analyzed demographic and usage data from US-based users of the Healthy Minds Program (HMP; N = 66,482)...