Molecular PsychiatryJune 11, 2026Ritchy Hodebourg, Lillian Duncan, Eric Dereschewitz et al.
The rising legal acceptance of cannabis and the high comorbidity between cannabis use disorder (CUD) and post-traumatic stress disorder (PTSD) highlight the importance of understanding how stress and cannabis influence the brain. We recently discovered that cannabinoid use promotes two PTSD-like symptoms: avoidance coping behaviors and the generalization of stress-coping responses to a neutral...
Los hongos que contienen psilocibina han sido utilizados durante siglos por culturas mesoamericanas en rituales sagrados, donde se consideraban un puente hacia lo divino. En la actualidad, esta sustancia ha captado el interés de la ciencia moderna. Cuando se consume, la psilocibina se transforma en psilocina, su forma activa, que actúa principalmente sobre receptores de serotonina en el...
Ketamine-assisted psychotherapy (KAP) is an emerging treatment approach that may enhance ketamine's antidepressant effects through neuroplastic synergism or transformative psychological experience. Despite growing clinical use, real-world KAP practices remain understudied. This cross-sectional survey examined the practices of fifty licensed KAP providers treating depression, recruited from a...
Chronic pain is common, costly, and for many, remains inadequately treated by existing pharmacologic and non-pharmacologic approaches. In parallel with growing dissatisfaction with conventional therapies, classic serotonergic psychedelics, such as psilocybin, lysergic acid diethylamide (LSD), ayahuasca, N,N-dimethyltryptamine (DMT), and mescaline, administered alone or within...
A ibogaína é um alcaloide indólico extraído da Tabernanthe iboga, investigado por seu possível papel na redução de sintomas de abstinência, fissura e recaída em transtornos por uso de substâncias. Este estudo teve como objetivo analisar, por meio de revisão de literatura, as evidências científicas sobre eficácia, segurança, mecanismos farmacológicos e implicações ético-regulatórias do uso da...
European PsychiatryJune 1, 2026P. Argitis, M. Demetriou, T. Koukouras et al.
Introduction Intravenous (IV) ketamine has demonstrated rapid antidepressant and anti-suicidal effects in treatment-resistant depression (TRD), yet interindividual variability in response remains significant. One unexplored factor is the impact of concomitant antidepressant medication during ketamine treatment. Desvenlafaxine, a serotonin-norepinephrine reuptake inhibitor (SNRI), may enhance...
Introduction Suicidal crisis represents a major psychiatric emergency, often occurring in the context of mood disorders and requiring rapid, effective interventions. Traditional antidepressant treatments usually have a delayed onset of action, underscoring the need for fast-acting therapeutic alternatives. In recent years, ketamine—an NMDA receptor antagonist—has emerged as a promising option...
Introduction Current antidepressants (SSRIs/SNRIs) face limitations including delayed onset (4–6 weeks) and modest efficacy (~50% response rates), while serotonergic psychedelics show rapid antidepressant potential via 5-HT2A agonism and synaptic plasticity but are hindered by hallucinogenic activity and 5-HT2B-mediated cardiotoxicity. Objectives To address these challenges, we characterize...
Abstract The last decade has seen a remarkable resurgence of interest in psychedelic drugs such as psilocybin (from magic mushrooms) LSD and DMT (dimethyl tryptamine – the active ingredient of ayahuasca). This has been driven by the discovery that these psychedelics all act agonists of 5-HT2A receptors plus human imaging studies that reveal this action leads to profound alterations in brain...
Consciousness is a fundamental component of cognition1, but the degree to which higher-order pattern recognition relies on it remains disputed2,3. Here we demonstrate the persistence of oddball discrimination, semantic processing and online prediction in individuals under general-anaesthesia-induced loss of consciousness4,5. Using high-density Neuropixels microelectrodes6 to record both...