75% of high school students report having tried alcohol at least once, with 28% reporting drinking alcohol in the last month. Alcohol is a depressant that slows brain and nervous system functions. Short term effects of excessive alcohol include poor reaction time, coordination and judgment, while long term abuse can damage health through issues like hangovers, weight gain and liver damage. The liver can only break down one serving of alcohol per hour, so any additional alcohol circulates in the bloodstream and continued drinking can lead to serious liver conditions like cirrhosis, which is irreversible scarring of the liver. Treatment for alcoholism focuses on counseling and medication rather than cure, as it is a disease involving physical or psychological dependence.