title: Dark green discoloration of the urine after prolonged propofol infusion: a case report.
abstract: OBJECTIVE
  Propofol, a commonly used sedative, has on rare occasions, been reported to discolour urine green. However, in previous reports, it is uncertain that whether this colour change is dose dependent. We report on a patient who produced dark green discoloration of urine from prolonged propofol infusion, administered for intractable epilepsy.
  
  
  METHODS
  The colour intensity of the patient's urine was dependent on propofol infusion rate. Reducing propofol infusion rate lightened the colour of the urine, eventually back to normal.
  
  
  CONCLUSIONS
  Green discoloration of the urine from propofol infusion is dose dependent. It is usually benign and reversible, as was the case for our patient.
authors.affiliation: Department of Neurology, Myongji Hospital, Kwandong University College of Medicine, GyeongGi, Korea. neurodasan@paran.com
authors.forename: B D
authors.initials: BD
authors.lastname: Ku
authors.forename: K C
authors.initials: KC
authors.lastname: Park
authors.forename: S S
authors.initials: SS
authors.lastname: Yoon
mesh_terms: D000328:Adult; D018686:Anesthetics, Intravenous / Q000008:administration & dosage / Q000009:adverse effects*; D003116:Color; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007262:Infusions, Intravenous; D008297:Male; D015742:Propofol / Q000008:administration & dosage / Q000009:adverse effects*; D013226:Status Epilepticus / Q000188:drug therapy; D014556:Urine / Q000737:chemistry*
chemical_list: D018686:Anesthetics, Intravenous; D015742:Propofol