Addiction is a long-term (chronic) brain disease that is also called substance abuse disorder. It can be caused by using too much of a drug or alcohol. Over time, addiction changes the structure and function of the brain. Find out more about addiction by taking this quiz.
Someone who is addicted needs to use more of the drug because his or her body develops a tolerance for it. The person also has withdrawal symptoms when he or she tries to stop using the drug. Other symptoms are:
Health care providers use screening tools to help treat addiction in patients. These tools are special questions made to look at alcohol and drug abuse.