1. It has been demonstrated that chlorpromazine, perphenazine, proclorperazine, promazine, thiopropazate, promethazine and reserpine are effective antagonists of mescaline-induced mortality in CF1 mice. 2. No significant protection was found with use of sodium phenobarbital, meprobamate, benactyzine, atropine, hydroxyzine, ethoxybutamoxane, SY-21, diphenylhydantoin, trimethadione, lysergic acid...
Feldberg and Sherwood's* previous studies of the behavior of cats after the intraventricular injection of various drugs opened up a new method of investigation. By this technique they showed that drugs injected into this area of high pharmacologic sensitivity could evoke various complex behavioral responses and conditions resembling sleep, anesthesia, profound muscular weakness, catatonia, and...
In the last 2 decades, there is a renaissance in the scientific investigation of the therapeutic potential of psychedelic compounds. It is studied for the treatment of many psychiatric disorders, including posttraumatic stress disorder. The treatment is always done in the setting of psychedelic-assisted psychotherapy. A little is known about the potential effects, outside of the setting of...
Ibogaine has garnered interest for its potential therapeutic properties in substance use and psychiatric disorders. Unlike classic psychedelics such as psilocybin or LSD, ibogaine remains underexplored in clinical research. This review aimed to synthesize the clinical literature on ibogaine use in humans over the past 3 decades, focusing on outcomes and safety. We conducted a narrative review...
There has been resurgence of interest in the therapeutic use of serotonergic ("classic") psychedelics in major depressive disorder (MDD) and end-of-life distress. This commentary offers a critical appraisal of current evidence for antidepressant effects of classic psychedelics from contemporary clinical trials and highlights pitfalls that should be addressed before clinical translation. A...
Psychedelic drugs have recently emerged as plausibly effective pharmacological agents for the management of depression, anxiety, and other neuropsychiatric conditions, including those that are treatment-resistent. The latter half of the 20th century marked a revolution in the treatment of mental illnesses, exemplified by the introduction of selective serotonin reuptake inhibitors and other...
Anaid Flores, Imelda Lizeth Lazcano-Carrasco, Mayra Lozano-Espinosa et al.
preprint
Abstract Psychedelic compounds have shown promising efficacy in the treatment of psychiatric disorders, yet the electronic features of their recognition by the serotonin 2A receptor (5-HT 2A ) remain poorly characterized. Here, we present a quantum-chemical analysis of local ligand–receptor models derived from the experimental 5-HT 2A structures of six ligands: serotonin, psilocin, lysergic...
Psychedelics are increasingly explored as tools to investigate consciousness and cognition, and as potential treatments for mood disorders. While neuroimaging has been central to characterizing their mechanisms of action, the interpretation of these studies may be confounded by the neurovascular effects elicited by these drugs. Here, we investigated the modulation of resting state neurovascular...
Eva Gallacher, Maria Arnold, Uwe Herwig et al.
preprint
Background: The role, necessity, and relevance of psychotherapy within psychedelic-assisted therapy (PAT) remain contested: some view it principally as safety support, whereas others regard it as essential to safety and efficacy. Patient-centred evidence on how psychotherapy is experienced within real-world PAT is scarce. We examined how patients understood the role of psychotherapy in their...
How do psychedelic drugs alter human brain function? Answering this question relies on our ability to understand how information is stored, transferred, and transformed across the cortex. Here, we leverage a precise mathematical framework for multivariate information decomposition to construct the first comprehensive picture of these processes across five compounds: LSD, psilocybin, ketamine,...