title: Codeine-induced syndrome of inappropriate antidiuretic hormone: case report.
abstract: BACKGROUND
  The syndrome of inappropriate antidiuretic hormone was first described in 1957 by Schwartz, and is characterised by hyponatraemia, inappropriately increased urine osmolality and urine sodium, and decreased serum osmolality in a euvolemic patient without edema. A patient with the syndrome of inappropriate antidiuretic hormone should have normal cardiac, renal, adrenal, hepatic, and thyroid functions and should not take any diuretics.
  
  
  METHODS
  We present a case of the syndrome of inappropriate antidiuretic hormone caused by codeine and associated with reduced urine volume, increased urine sodium, and decreased serum sodium concentration.
  
  
  CONCLUSIONS
  The syndrome of inappropriate antidiuretic hormone is a disease that can lead to morbidity and even mortality. Clinicians should measure serum electrolytes intermittently in order to avoid missing the diagnosis of the syndrome of inappropriate antidiuretic hormone in patients using opioid.
authors.affiliation: Department of Internal Medicine, Kayseri Training and Research Hospital, Kayseri, Turkey.
authors.forename: Samet
authors.initials: S
authors.lastname: Karahan
authors.affiliation: Department of Internal Medicine, Kayseri Training and Research Hospital, Kayseri, Turkey.
authors.forename: Hatice
authors.initials: H
authors.lastname: Karagöz
authors.affiliation: Department of Internal Medicine, Kayseri Training and Research Hospital, Kayseri, Turkey.
authors.forename: Abdulsamet
authors.initials: A
authors.lastname: Erden
authors.affiliation: Department of Internal Medicine, Kayseri Training and Research Hospital, Kayseri, Turkey.
authors.forename: Deniz
authors.initials: D
authors.lastname: Avcı
authors.affiliation: Department of Internal Medicine, Kayseri Training and Research Hospital, Kayseri, Turkey.
authors.forename: Kübra
authors.initials: K
authors.lastname: Esmeray
keywords: Arginine vasopressin; GABA agents; codeine phospate; hyponatraemia; inappropriate ADH syndrome