The psychotic manifestations of alcohol physical and psychiatric disorders have been documented for many centuries; however, the distinction of the various disorders remains less well defined. Individuals often have comorbid elements of several disorders, and the psychotic phenomenon are often diverse. The psychotic manifestations of alcohol withdrawal, delirium tremens, alcohol hallucinosis, Wernicke's-Korsakoff's psychosis, alcohol pellagra and hepatic encephalopathy, Marchiafava-Bignami, central pontine myelinosis, and alcohol dementia are discussed in this article.