Table 1:
Potential Causes of Delirium
Intracranial Causes
  • Brain trauma
  • Seizures and postictal states
  • Infections
    • Encephalitis
    • Meningitis
  • Neoplasm
  • Vascular disorders
Drugs
  • Anticholinergics
  • Anticonvulsants
  • Antihypertensives
  • Antiparkinsonian agents
  • Antipsychotics
  • Cardiac glycosides
  • Cimetidine
  • Clonidine
  • Disulfiram
  • Insulin
  • Opiates
  • Phencyclidine
  • Ranitidine
  • Salicylates
  • Sedatives
  • Steroids
  • Alcohol

Poisons

  • Carbon monoxide
  • Heavy metals and other industrial poisons
Endocrine Dysfunction (Hypo- or Hyperfunction)
  • Adrenal
  • Pancreatic
  • Parathyroid
  • Pituitary
  • Thyroid
Diseases of Nonendocrine Origin
  • Cardiovascular diseases
    • Arrhythmias
    • Cardiac failure
    • Hypertensive encephalopathy
    • Hypotension
  • Deficiency states
    • Folate
    • Nicotinic acid
    • Thiamine
    • Vitamin B12
  • Kidney and urinary tract diseases
    • Uremic encephalopathy
  • Liver diseases
    • Hepatic encephalopathy
  • Lung diseases
    • Carbon dioxide narcosis
    • Hypoxia
  • Other
    • Systemic infections with fever and sepsis
    • Trauma (head or general)
Adapted from reference 2.
Copyright 2002 The Cleveland Clinic Foundation

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