It is a participative, group-based approach to long-term mental illness, personality disorders and substance use disorders. The approach is usually residential, with the clients and therapists living together, but increasingly residential units have been replaced by day units. It is based on group work (around 30 patients together for 9 and 18 months) and includes group psychotherapy together with practical activities.
Therapeutic communities have gained some reputation for success in rehabilitation and patient satisfaction in different countries, providing treatment for personality disorders, emotional and interpersonal problems, and substance use disorders.
This information is from high income country countries, but it may be also useful for countries in other socio economic levels.