The different substance abuse treatment programs which are available to drug addicted persons in Andover can differ in many various ways. Quite a few drug and alcohol abuse rehab programs are conducted in a residential or inpatient facility, where individuals reside the entire time they are in rehab which supplies a more therapeutic treatment setting. Others offer alcohol and drug abuse rehab services on an outpatient basis which provides a sense of versatility, although outpatient centers are not always an appropriate alcohol and drug abuse treatment service for people in Andover who are having difficulties with long term drug addiction issues. Regardless of whether inpatient or outpatient alcohol and drug abuse rehab services are selected, there are varying lengths of time that people will be expected to stay in the drug rehab center. For instance, many short-term programs provide services for 4 weeks or less, whereas long-term facilities will require at least a 12 week stay.