Alcohol is the most widely abused drug. Approximately 10% of the U.S. population has an alcohol problem, and nearly all people with an alcohol issue are employed and have a family. Signs of alcohol abuse include drinking to relax, having blackouts or forgetting what happened while drinking and increased alcohol use. Those who abuse alcohol may not as responsible at home or at work as they once were. They may also have legal issues such as DWIs. Financial stress can increase due to job loss and money spent on drinking. Alcohol problems affect job performance, creating absenteeism, tardiness and decreased performance. Alcoholics may experience tolerance, which is when a person has to drink more to get the same effect.