title: Sleep changes after 4 consecutive days of venlafaxine administration in normal volunteers.
abstract: BACKGROUND
  The purpose was to examine the effect of the antidepressant drug venlafaxine on sleep architecture and periodic leg movements of sleep (PLMS) in normal volunteers.
  
  
  METHODS
  Eight normal volunteers were studied under laboratory sleep conditions as follows: 1 acclimatization night, 1 baseline night, and 4 consecutive nights of venlafaxine p.o. administration (75 mg during the first 2 nights and 150 mg the last 2 nights).
  
  
  RESULTS
  Venlafaxine increased both wake time and sleep stage I. Sleep stages II and III were reduced. REM sleep time was reduced after the first venlafaxine dose, and, by the fourth night, REM sleep was completely suppressed in all volunteers. Six of the eight volunteers showed PLMS at a frequency above 25 per hour.
  
  
  CONCLUSIONS
  Venlafaxine produces several sleep disturbances, which include abnormal leg movements.
authors.affiliation: Servicio de Investigación del Hospital Psiquiátrico Fray Bernardino Alvarez, Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City.
authors.forename: R J
authors.initials: RJ
authors.lastname: Salín-Pascual
authors.forename: L
authors.initials: L
authors.lastname: Galicia-Polo
authors.forename: R
authors.initials: R
authors.lastname: Drucker-Colín
mesh_terms: D000328:Adult; D018687:Antidepressive Agents, Second-Generation / Q000009:adverse effects / Q000494:pharmacology*; D003511:Cyclohexanols / Q000009:adverse effects / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008297:Male; D012148:Restless Legs Syndrome / Q000139:chemically induced; D012890:Sleep / Q000187:drug effects*; D012894:Sleep Stages / Q000187:drug effects; D012893:Sleep Wake Disorders / Q000139:chemically induced; D012895:Sleep, REM / Q000187:drug effects; D000069470:Venlafaxine Hydrochloride
chemical_list: D018687:Antidepressive Agents, Second-Generation; D003511:Cyclohexanols; D000069470:Venlafaxine Hydrochloride