The various alcohol and drug abuse treatment programs which are accessible to drug and alcohol addicted people in Dulles, Virginia can differ in several different ways. Quite a few alcohol and drug abuse rehabilitation services take place in a residential or inpatient facility, where clientele reside for the duration of their rehab which provides a more therapeutic rehab setting. Others provide substance abuse rehab services on an outpatient basis which provides a sense of flexibility, although outpatient facilities may not be an appropriate drug and alcohol abuse treatment program for men and women in Dulles, Virginia who are having difficulties with long term drug or alcohol addiction problems. Whether inpatient or outpatient alcohol and drug abuse rehabilitation programs are chosen, there are varying lengths of time that people will be asked to stay in the drug rehabilitation program. For instance, quite a few short-term programs offer programs for 30 days or less, whereas long-term centers will require at least a 90 day stay.