''Delirium tremens (colloquially, the DTs) is a condition almost invariably associated with complete alcohol withdrawal in an individual with a reported history of long-term alcohol consumption.''
This website has a good fact sheet on the effect of alcohol on the health. It talks about patterns of drinking, medical problems realted to alcohol, mortality from alcohol, etc. Clicking on this link will start the download.
The long-term effects of alcohol dependency include, among other, pancreatitis, heart disease, neuropathy, or damage to the nerves, bleeding esophageal varices, brain degeneration and alcoholic neuropathy, and cirrhosis.