title: Cannabinoids and Psychosis.
abstract: There is growing interest in the relationship between cannabis and psychosis. The link between cannabis use and psychosis comprises three distinct relationships: acute psychosis associated with cannabis intoxication, acute psychosis that lasts beyond the period of acute intoxication, and persistent psychosis not time-locked to exposure. Experimental studies reveal that cannabis, tetrahydrocannabinol (THC) and synthetic cannabinoids reliably produce transient positive, negative, and cognitive symptoms in healthy volunteers. Case-studies indicate that cannabinoids can induce acute psychosis which lasts beyond the period of acute intoxication and persisting as long as a month. Exposure to cannabis in adolescence is associated with an increased risk for later psychotic disorder in adulthood; this association is consistent, somewhat specific, shows a dose-response, and is biologically plausible. The link between cannabinoids and psychosis is greater with earlier age of exposure to cannabinoids, childhood abuse and genetic vulnerability. However, cannabinoids are neither necessary nor sufficient to cause a persistent psychotic disorder. More likely cannabinoids are a 'component cause' interacting with other known (family history) and unknown factors to result in psychosis outcomes. While more research is needed to better understand the relationship between cannabinoid use and psychosis, and the neural underpinnings of this link, clinicians should be mindful of the potential risk of psychosis especially in vulnerable populations, including adolescents and those with a psychosis diathesis.
authors: Psychiatry Service, 116A, VA Connecticut Healthcare System, 950 Campbell Avenue, West Haven, CT 06516, United States.
authors: Deepak Cyril
authors: DC
authors: D'Souza
authors: Rajiv
authors: R
authors: Radhakrishnan
authors: Mohamed
authors: M
authors: Sherif
authors: Jose
authors: J
authors: Cortes-Briones
authors: John
authors: J
authors: Cahill
authors: Swapnil
authors: S
authors: Gupta
authors: Patrick D
authors: PD
authors: Skosnik
authors: Mohini
authors: M
authors: Ranganathan
mesh_terms: D002186:Cannabinoids / Q000009:adverse effects*; D006801:Humans; D011618:Psychotic Disorders / Q000150:complications*
chemical_list: D002186:Cannabinoids
keywords: Cannabis; THC; cannabinoids; cognition; psychosis; schizophrenia