Tom P. Freeman
University of Bath
Publications 130
#1Musa SamiH-Index: 4
#2Diego QuattroneH-Index: 8
Last.Ilaria TarriconeH-Index: 16
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Aims: First Episode Psychosis (FEP) patients who use cannabis experience more frequent psychotic and euphoric intoxication experiences compared to controls. It is not clear whether this is consequent to patients being more vulnerable to the effects of cannabis use or to their heavier pattern of use. We aimed to determine whether extent of use predicted psychotic-like and euphoric intoxication experiences in FEP patients and controls and whether this differs between groups. Methods: We analysed d...
#1Will Lawn (UCL: University College London)H-Index: 8
#2Ludo Mithchener (UCL: University College London)
Last.Cja Morgan (University of Exeter)H-Index: 33
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#1H. Valerie Curran (UCL: University College London)H-Index: 3
#2Chandni Hindocha (UCL: University College London)H-Index: 10
Last.Tom P. Freeman (UCL: University College London)H-Index: 20
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BACKGROUND: Changes in cannabis regulation globally make it increasingly important to determine what predicts an individual's risk of experiencing adverse drug effects. Relevant studies have used diverse self-report measures of cannabis use, and few include multiple biological measures. Here we aimed to determine which biological and self-report measures of cannabis use predict cannabis dependency and acute psychotic-like symptoms. METHOD: In a naturalistic study, 410 young cannabis users were a...
#1Matthew B. Wall (UCL: University College London)H-Index: 19
#2Rebecca Anne Pope (UCL: University College London)H-Index: 3
Last.Abigail M. Freeman (UCL: University College London)
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Background:Two major constituents of cannabis are Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD). THC is the main psychoactive component; CBD may buffer the user against the harmful effects of THC.Aims:We examined the effects of two strains of cannabis and placebo on the human brain’s resting-state networks using fMRI.Methods:Seventeen healthy volunteers (experienced with cannabis, but not regular users) underwent three drug treatments and scanning sessions. Treatments were cannabis contain...
#1Tom P. Freeman (University of Bath)H-Index: 20
#2Teodora Groshkova (European Monitoring Centre for Drugs and Drug Addiction)H-Index: 4
Last.Michael T. Lynskey ('KCL': King's College London)H-Index: 85
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European cannabis resin and herbal cannabis increased in potency and price from 2006‐2016. Cannabis resin (but not herbal cannabis) increased in the quantity of Δ9‐tetrahydrocannabinol per Euro spent. Marked increases in resin potency and value from 2011‐2016 are consistent with the emergence of new resin production techniques in European and neighbouring drug markets.
#1M. Di Forti (Mental Health Foundation)H-Index: 34
#2Diego Quattrone (Mental Health Foundation)H-Index: 8
Last.Caterina La Cascia (University of Palermo)H-Index: 8
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Summary Background Cannabis use is associated with increased risk of later psychotic disorder but whether it affects incidence of the disorder remains unclear. We aimed to identify patterns of cannabis use with the strongest effect on odds of psychotic disorder across Europe and explore whether differences in such patterns contribute to variations in the incidence rates of psychotic disorder. Methods We included patients aged 18–64 years who presented to psychiatric services in 11 sites across E...