There is renewed interest in psychedelics, such as psilocybin, as therapies for multiple difficult-to-treat psychiatric disorders. Even though psychedelics can induce highly pleasant or aversive experiences, depending on multiple personal and environmental factors, there is little research into how such experiences impact post-acute mood-altering actions. He...
Understanding neuromodulatory effects of serotonin 2A receptor (5-HT2A R) agonists with diverse pharmacological profiles is relevant to advancing psychedelic-related drug applications. We performed simultaneous positron emission tomography (PET) and pharmacological magnetic resonance imaging (phMRI) in anesthetized nonhuman primates (NHP; N = 3) to examine p...
To better understand the potential benefits of psychedelics in overeating disorders, Tryp Therapeutics will conduct a safety and feasibility clinical trial using TRP8802 among individuals with Binge Eating Disorder. This is a single-center phase 2a open-label study to assess the safety and feasibility of a single dose of TRP8802 in subjects with BED. Subject...
Abstract Objectives The first line for symptom management of attention deficit hyperactivity disorder (ADHD) is a class of medications that act on dopamine and noradrenaline receptors, which leads to symptom reduction at the cost of significant side effects. These side effects have led to community searching for alternative methods that manage ADHD symptoms ...
The serotonergic psychedelic psilocybin shows efficacy in treating neuropsychiatric disorders, though the mechanism(s) underlying its therapeutic effects remain unclear. We show that a similar psychedelic tryptamine, N,N-dipropyltryptamine (DPT), completely prevents audiogenic seizures (AGS) in an Fmr1 knockout mouse model of fragile X syndrome at a 10 mg/kg...
This Special Issue of Neuropharmacology on psychedelics provides a timely and comprehensive update on progress following the previous Neuropharmacology Special Issue "Psychedelics: New Doors, Altered Perceptions". Remarkable advances have been made in basic and clinical research on psychedelics in the five years since 2018. It is partly based on the seminar ...
Chronic pain is a leading cause of disability, reduced productivity, healthcare seeking behavior, and a contributor to opioid overdose in the United States. For many people, pain can be satisfactorily managed by existing medicines and comprehensive psychosocial treatments. For others, available treatments are either ineffective or not acceptable, due to side...
The U.S. National Institutes of Health (NIH) convened a seminal first ever psychedelic drug substance-focused speaker series, from April 22 to June 10, 2021, titled the "NIH Psilocybin Research Speaker Series." This speaker series provided evidence-based scientific information to the public and the scientific community. Its aims were to assess the current st...
Back to table of contents Previous article Next article Clinical & ResearchFull AccessPsychedelic Renaissance: Clinical Health Justice, Patient Safety, and Equity Need to Be Put FirstJacques Ambrose, M.D., M.P.H., Jeffrey Zabinski, M.D., M.S.W.Jacques AmbroseSearch for more papers by this author, M.D., M.P.H., Jeffrey ZabinskiSearch for more papers by this a...
The need to identify effective therapies for the treatment of psychiatric disorders is a particularly important issue in modern societies. In addition, difficulties in finding new drugs have led pharmacologists to review and re-evaluate some past molecules, including psychedelics. For several years there has been growing interest among psychotherapists in ps...
Back to table of contents Previous article Next article ViewpointsFull AccessThe Return of Psychedelics: Still Time to Prevent TragedyStanley N. Caroff, M.D.Stanley N. Caroff, M.D.Published Online:31 Mar 2021https://doi.org/10.1176/appi.pn.2021.4.8AbstractRecently, a movement reviving psychedelic drugs has emerged among physicians, echoed by activists like M...
Serotonergic hallucinogens such as lysergic acid diethylamide (LSD) induce head twitches in rodents via 5-HT receptor activation. The goal of the present investigation was to determine whether a correlation exists between the potency of hallucinogens in the mouse head-twitch response (HTR) paradigm and their reported potencies in other species, specifically ...
Sleep paralysis is a state of involuntary immobility occurring at sleep onset or offset, often accompanied by uncanny "ghost-like" hallucinations and extreme fear reactions. I provide here a neuropharmacological account for these hallucinatory experiences by evoking the role of the serotonin 2A receptor (5-HT2AR). Research has shown that 5-HT2AR activation c...
Classical hallucinogens are a class of psychoactive drugs that reliably alter perception, cognition, and behavior. Recently, a renewed focus on the mechanisms responsible for the effects of hallucinogens has emerged, as a renaissance of recreational availability and therapeutic interest has taken root. Identifying pharmacological substrates of hallucinogen e...
Recent, well-controlled - albeit small-scale - clinical trials show that serotonergic psychedelics, including psilocybin and lysergic acid diethylamide, possess great promise for treating psychiatric disorders, including treatment-resistant depression. Additionally, fresh results from a deluge of clinical neuroimaging studies are unveiling the dynamic effect...
How do psychedelic drugs produce their characteristic range of acute effects in perception, emotion, cognition, and sense of self? How do these effects relate to the clinical efficacy of psychedelic-assisted therapies? Efforts to understand psychedelic phenomena date back more than a century in Western science. In this article I review theories of psychedeli...
Recent evidence indicates that psilocybin with psychological support may be effective for treating depression. Some studies have found that patients with depression show heightened amygdala responses to fearful faces and there is reliable evidence that treatment with SSRIs attenuates amygdala responses (Ma, 2015). We hypothesised that amygdala responses to e...
The development of pharmacological magnetic resonance imaging (phMRI) has presented the opportunity for investigation of the neurophysiological effects of drugs in vivo. Psilocin, a hallucinogen metabolised from psilocybin, was recently reported to evoke brain region-specific, phMRI signal changes in humans. The present study investigated the effects of psil...
The serotonin (5-HT) and glutamate (Glu) neurotransmitter systems are suspected in the etiology and pathophysiology of schizophrenia, as well as in the mechanism of action of antipsychotic drugs. A high affinity for the serotonin 5-HT2A receptor is a common characteristic of all atypical antipsychotics. Hallucinogenic 5-HT2A agonists, such as lysergic acid d...
