title: Keep off the grass? Cannabis, cognition and addiction.
abstract: In an increasing number of states and countries, cannabis now stands poised to join alcohol and tobacco as a legal drug. Quantifying the relative adverse and beneficial effects of cannabis and its constituent cannabinoids should therefore be prioritized. Whereas newspaper headlines have focused on links between cannabis and psychosis, less attention has been paid to the much more common problem of cannabis addiction. Certain cognitive changes have also been attributed to cannabis use, although their causality and longevity are fiercely debated. Identifying why some individuals are more vulnerable than others to the adverse effects of cannabis is now of paramount importance to public health. Here, we review the current state of knowledge about such vulnerability factors, the variations in types of cannabis, and the relationship between these and cognition and addiction.
authors.affiliation: Clinical Psychopharmacology Unit, University College London, Gower Street, London WC1E 6BT, UK.
authors.forename: H Valerie
authors.initials: HV
authors.lastname: Curran
authors.affiliation: Clinical Psychopharmacology Unit, University College London, Gower Street, London WC1E 6BT, UK.
authors.forename: Tom P
authors.initials: TP
authors.lastname: Freeman
authors.affiliation: Clinical Psychopharmacology Unit, University College London, Gower Street, London WC1E 6BT, UK.
authors.forename: Claire
authors.initials: C
authors.lastname: Mokrysz
authors.affiliation: Department of Psychiatry, University of Pittsburgh, 3811 O'Hara Street, Pittsburgh, Pennsylvania 15213, USA.
authors.forename: David A
authors.initials: DA
authors.lastname: Lewis
authors.affiliation: Clinical Psychopharmacology Unit, University College London, Gower Street, London WC1E 6BT, UK.|Psychopharmacology and Addiction Research Centre, University of Exeter, Perry Road, Exeter EX4 4QG, UK.
authors.forename: Celia J A
authors.initials: CJ
authors.lastname: Morgan
authors.affiliation: The Scripps Research Institute, 10550 N. Torrey Pines Road, SP30-2001, La Jolla, California 92037, USA.
authors.forename: Loren H
authors.initials: LH
authors.lastname: Parsons
mesh_terms: D000818:Animals; D016739:Behavior, Addictive / Q000139:chemically induced* / Q000378:metabolism / Q000523:psychology; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D002188:Cannabis / Q000009:adverse effects* / Q000378:metabolism; D016022:Case-Control Studies; D003071:Cognition / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D008385:Marijuana Smoking / Q000009:adverse effects* / Q000378:metabolism / Q000523:psychology; D043884:Receptor, Cannabinoid, CB1 / Q000378:metabolism; D012307:Risk Factors
chemical_list: D043884:Receptor, Cannabinoid, CB1