Current Opinion in Psychology
April 1, 2021
Ian Hamilton, Harry Sumnall
This review provides the reader with an update on developments in research relating to cannabis psychosis. For over four decades researchers and clinicians have focused on the relationship between exposure to cannabis and the emergence of psychotic symptoms. This has proved to be a complicated topic to investigate but research has provided some valuable insights as to the nature of this...
Journal of psychopharmacology (Oxford, England)
November 1, 2011
Harry Sumnall, Fiona Measham, Simon D. Brandt et al.
38 citations
Salvia divinorum is a hallucinogenic plant with ethnopharmacological and recreational uses. It differs from classic serotonergic hallucinogens such as LSD and psilocin in both phenomenology and potent agonist activity of the active component salvinorin A at κ-opioid receptors. Awareness of S. divinorum has grown recently, with both an increase in its public representation and concern over its...
BMJ
July 6, 2010
Simon D. Brandt, Harry Sumnall, Fiona Measham et al.
57 citations
Since the recent ban on mephedrone,1 2several alternative products have been introduced on internet websites. One of the most prominently discussed second generation products is Energy 1 (NRG-1), also advertised as naphyrone (naphthylpyrovalerone, O-2482), which originated from a group of compounds previously described in the medicinal chemistry …
Journal of psychopharmacology (Oxford, England)
September 1, 2006
Harry Sumnall, Jon C. Cole, Lisa Jerome
117 citations
Previous investigations of the subjective effects of MDMA (material sold as ecstasy) have conducted interviews and surveys of various groups of ecstasy users within particular sub-populations. This study examined subjective drug effects reported by different sub-populations of ecstasy users and explored whether the function or purpose served by using ecstasy influenced the nature of the drug...
Journal of psychopharmacology (Oxford, England)
January 2005
Harry R Sumnall, Jon C Cole
National drugs information strategies convey the message that use of Ecstasy is associated with an increase in both the incidence and severity of major depressive disorder. However, very little primary research supports this. Unlike apparent deficits in higher cognitive functions, most published studies have found no difference in self-reported depressive symptomatology between Ecstasy users...
Addiction
December 1, 2002
Jon C. Cole, Mike Bailey, Harry Sumnall et al.
149 citations
ABSTRACT Aims To examine the variation in the content of ecstasy tablets seized in the north‐west of England during 2001 and to compare it to the UK average from 1991 to 2001. Measurements All tablets submitted to the Forensic Science Service in the north‐west of England during 2001 were analysed by high performance liquid chromatography with diode array detection (HPLC‐DAD). The mean MDMA...