Delirium is most commonly seen in

Factors precipitating delirium Drugs Primary neurologic diseases Surgery Sedative-hypnotics Narcotics Anticholinergic drugs Multiple drugsTreatment Alcohol or drug withdrawal Stroke, nondominant hemispheric Intracranial bleeding Meningitis or encephalitis Ohopedic surgery Cardiac surgery Prolonged cardiopulmonary bypass Noncardiac surgery Intercurrent Illnesses Environmental Infections Iatrogenic complications Dehydration Hypoxia Shock Anemia Fever or hypothermia Admission to ICU Use of physical restraints Use of bladder catheter Use of multiple procedures Pain Emotional stress Prolonged sleep deprivation Reference: Page No.1157 chap. 10.2 Delirium Kaplan & Sadock's Comprehensive Textbook of Psychiatry, 9th Edition