The duration of alcohol withdrawal can vary from person to person and depends on various factors such as the severity of alcohol addiction, how long the individual has been drinking, and whether they have gone through withdrawal before. Withdrawal symptoms usually start within 6-24 hours after the last drink and can last up to a week or more. However, some people may experience protracted withdrawal symptoms that can last for several months. It is important for individuals with alcohol addiction to seek medical help during the withdrawal process to manage symptoms and prevent potential complications.