The timeline for alcohol detox to start varies from person to person, but symptoms can begin as early as a few hours after the last drink. The acute stage of alcohol detox typically lasts for several days to a week, during which time the body rids itself of alcohol and withdrawal symptoms can peak. However, some symptoms, such as cravings and insomnia, can persist for weeks or even months after stopping drinking. The duration of alcohol detox and withdrawal can be influenced by several factors, including the severity of alcohol dependence, overall health, and any underlying medical or mental health conditions. It is important to seek medical attention and supervision during alcohol detox, as complications can arise that require prompt medical intervention.