BJPsych Open
June 1, 2026
Sarah Shackleton, Onuswale Oni, Stephen Kaar
Aims: Recreational ketamine use and treatment-seeking for associated complications is increasing in England. Complications of ketamine dependence can be debilitating, leading to continued dependence and surgical intervention. However, treatment remains under-researched, with lacking understanding of those seeking treatment or requiring specialist inpatient detoxification. This study aims to...
European Psychiatry
November 17, 2023
K. Beck, A. Arumuham, S. Brugger et al.
1 citation
Introduction N-Methyl-D-Aspartate Receptor (NMDAR) hypofunction is hypothesised to underlie psychosis but this has not been tested early in illness. Objectives Our aim was to determine if NMDAR availability was lower in patients with first episode psychosis compared to healthy controls. Methods To address this, we studied 40 volunteers (21 patients with first episode psychosis and 19 matched...
Translational Psychiatry
August 15, 2021
Katherine Beck, Atheeshaan Arumuham, Mattia Veronese et al.
Abstract N-methyl-D-aspartate receptor (NMDAR) hypofunction is hypothesised to underlie psychosis but this has not been tested early in illness. To address this, we studied 40 volunteers (21 patients with first-episode psychosis and 19 matched healthy controls) using PET imaging with an NMDAR selective ligand, [18F]GE-179, that binds to the ketamine binding site to index its distribution volume...
Journal of psychopharmacology (Oxford, England)
April 2016
Stephen J. Kaar, Jason Ferris, Jon Waldron et al.
In recent years the recreational use of inhaled nitrous oxide gas (N2O) is becoming increasingly popular, yet little is known about the characteristics of its users or the effects they experience. This paper presents original research from the 2014 Global Drug Survey (GDS) (n=74,864). GDS runs the largest survey of recreational drug use in the world. The findings confirm N2O as a very common...
Journal of Psychopharmacology
November 27, 2013
Adam Winstock, Stephen J. Kaar, Rohan Borschmann
101 citations
This paper presents original research on prevalence, user characteristics and effect profile of N,N-dimethyltryptamine (DMT), a potent hallucinogenic which acts primarily through the serotonergic system. Data were obtained from the Global Drug Survey (an anonymous online survey of people, many of whom have used drugs) conducted between November and December 2012 with 22,289 responses. Lifetime...