If they have not already suffered extensive and irreversible brain damage, there is a strong likelihood that some form of alcoholic psychosis will develop. The amnesia and confabulation of Karsakoff's syndrome and the convulsions and comas of Wernicke's disease are possibilities. Death may come in advanced cases of cirrhosis of the liver, pancreatitis, or hemorrhaging varices of the esophagus. Or they may arrange their own suicide. After all, the suicide rate among alcoholics is three times the normal rate of self-extermination.
T here is no cure to alcoholism.
But treatment is of no avail unless the alcoholic subscribes to total abstinence from drinking alcohol in any form. As pointed out above, once they have lost control over alcohol, they will never regain it.