The various alcohol and drug abuse rehab services which are offered to alcohol and drug addicted persons in Andover, New Hampshire can vary in several various ways. Some substance abuse rehabilitation services are offered in a residential or inpatient setting, where individuals reside for the duration of their rehabilitation which provides a more therapeutic rehab setting. Others provide drug and alcohol abuse rehabilitation programs on an outpatient basis which allows for more flexibility, though outpatient facilities are not always a suitable drug and alcohol abuse rehabilitation service for individuals in Andover, New Hampshire who are having difficulties with serious drug addiction issues. Regardless of whether inpatient or outpatient alcohol and drug abuse rehab programs are selected, there are varying lengths of time that individuals will be required to remain in the alcohol and drug treatment program. For instance, many short-term programs offer programs for a month or less, while long-term centers will require at least a 3 month stay.