The different drug and alcohol abuse rehabilitation programs which are offered to drug addicted persons in Amherst can differ in many different ways. Some alcohol and drug abuse rehab programs are offered in a residential or inpatient location, where individuals reside the entire time they are in treatment which supplies a more therapeutic rehab environment. Others offer alcohol and drug abuse treatment services on an outpatient basis which provides a sense of versatility, although outpatient centers are not always a suitable drug and alcohol abuse rehab program for individuals in Amherst who are struggling with long term addiction issues. Whether or not inpatient or outpatient substance abuse rehabilitation programs are selected, there are varying lengths of time that men and women will be required to continue to be in the drug rehabilitation program. For example, some short-term programs provide services for a month or less, while long-term facilities will demand at least a 90 day stay.