How is the diagnosis of delirium tremens made?

History. History of alcohol abuse, time since last use, elevated temperature/pulse/blood pressure and sometimes visual hallucinations.
History. Classically secondary to cessation of alcohol intake in a chronic alcoholic. Within the first 6-96 hrs, there can be a convulsion followed by delirium, associated with agitation, hallucinations (especially of bugs), confusion, disorientation, combativeness and aggression. This is clearly a mixed issue, as one needs to supplement thiamine, and stop the usage of alcohol.