The different alcohol and drug abuse rehab programs which are offered to alcohol and drug addicted individuals in Lancaster, NY. can differ in a lot of different ways. Quite a few drug and alcohol abuse rehab services are offered in a residential or inpatient setting, where clientele remain for the duration of their treatment which provides a more therapeutic treatment environment. Others provide substance abuse treatment services on an outpatient basis which allows for more flexibility, although outpatient programs may not be a suitable drug and alcohol abuse treatment service for men and women in Lancaster, NY. who are having difficulties with long term addiction issues. Whether or not inpatient or outpatient drug and alcohol abuse rehabilitation services are selected, there are varying lengths of time that people will be expected to remain in the drug rehab center. For instance, quite a few short-term programs provide programs for a month or less, while long-term centers will require at least a 12 week stay.