Rehabilitation centers are often part of bigger mental health care centers. They offer the possibility to patients who have trouble kicking the habit at home, to do this under 'easier' circumstances. The addicts may not have enough motivation to quit in their home situation or they receive little support from the people around them to be treated within their home environment. Treatments in clinics offer an alcohol and drug free environment in which individual and group therapies can take place. Every clinic has its own methods of treatment, but in general much attention is given to the addicts themselves, the addicts in the group and counseling to return to the home situation. It is not always necessary to go to a rehabilitation center to be treated for an addiction.

They also offer part-time treatments, in which the person continues to live at home, but follows the therapy in the clinic during a large part of the week. Another possibility is to have treatments in an outpatients' department or ambulatory treatment, in which the patient also continues to live at home and receives treatment once a week, for example.

The duration of the treatment depends on the person and may vary from several months to several years.