A structured environment in which individuals with psychoactive substance use disorders live in order to achieve rehabilitation. Such communities are often specifically designed for drug-dependent people; they operate under strict rules, are run mainly by people who have recovered from a dependence and are often geographically isolated. Therapeutic communities are characterized by a combination of “reality testing” (through confrontation of the individual’s drug problem) and support for recovery from staff and peers. They are usually closely aligned with mutual-help groups such as Narcotics Anonymous.