title: Caffeine-induced psychosis.
abstract: As a competitive adenosine antagonist, caffeine affects dopamine transmission and has been reported to worsen psychosis in people with schizophrenia and to cause psychosis in otherwise healthy people. We report of case of apparent chronic caffeine-induced psychosis characterized by delusions and paranoia in a 47-year-old man with high caffeine intake. The psychosis resolved within 7 weeks after lowering caffeine intake without use of antipsychotic medication. Clinicians might consider the possibility of caffeinism when evaluating chronic psychosis.
authors.affiliation: Department of Psychology, Neuroscience Center, Brigham Young University, Provo, UT, USA. dawson_hedges@byu.edu
authors.forename: Dawson W
authors.initials: DW
authors.lastname: Hedges
authors.forename: Fu Lye
authors.initials: FL
authors.lastname: Woon
authors.forename: Scott P
authors.initials: SP
authors.lastname: Hoopes
mesh_terms: D058916:Adenosine A1 Receptor Antagonists; D058917:Adenosine A2 Receptor Antagonists; D002110:Caffeine / Q000009:adverse effects*; D000697:Central Nervous System Stimulants / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010259:Paranoid Disorders / Q000139:chemically induced / Q000523:psychology; D011605:Psychoses, Substance-Induced / Q000523:psychology* / Q000628:therapy
chemical_list: D058916:Adenosine A1 Receptor Antagonists; D058917:Adenosine A2 Receptor Antagonists; D000697:Central Nervous System Stimulants; D002110:Caffeine