In more severe cases, there can be withdrawal seizures or delirium tremens.Delirium tremens is characterized by loss of orientation with tremulousness, palpitations, sweating and hypertension.

The year was 1979 and Danny McFadden was in Geraldton, Western Australia, about 14,000km (8,700 miles) from London, England, where he grew up. He was 28, and awoke one day to four blank walls ...