Alcohol withdrawal

Alcohol withdrawal occurs when a person who has been drinking heavily for a long time suddenly stops or reduces their alcohol intake. It primarily affects the nervous system, causing symptoms like tremors, anxiety, and sweating. The brain becomes overactive because it has adapted to the presence of alcohol, which normally depresses brain activity. When alcohol is removed, this leads to a state of nervous system hyperexcitability. Symptoms can range from mild discomfort to severe complications such as seizures or delirium tremens. This condition can significantly impact a person's health and requires careful medical attention.

Alcohol withdrawal is a clinical syndrome resulting from the abrupt cessation or reduction of chronic heavy alcohol use. It is characterized by a hyperexcitable state of the central nervous system due to the sudden removal of alcohol's GABAergic inhibitory effects and unopposed NMDA receptor excitatory activity. The condition typically manifests within hours to a few days after stopping alcohol and includes symptoms such as autonomic hyperactivity, tremors, hallucinations, and seizures. Severe cases may progress to delirium tremens, a life-threatening complication marked by confusion, agitation, and autonomic instability. The syndrome reflects the brain's neuroadaptive changes to chronic alcohol exposure and is a major cause of morbidity in patients with alcohol use disorder.