Stages of Alcohol Withdrawal Syndrome (AWS) may be classified as uncomplicated withdrawal (first 6 hours), alcohol hallucinosis  (8-12 hours), alcohol withdrawal seizures (12-24 hours), and alcohol withdrawal delirium (24-72 hours).
Alcohol withdrawal classification
Alcohol withdrawal diagnostic criteria
Delirium classification
Delirium diagnostic criteria
Amnesia classification scheme
Psychosis classification
Alcohol withdrawal epidemiology and demographics
Amnesia classification