The different alcohol and drug abuse rehab programs which are accessible to alcohol and drug addicted people in Riverwood can differ in several different ways. Quite a few substance abuse treatment programs are conducted in a residential or inpatient location, where clients remain the entire time they are in treatment which provides a more therapeutic rehab environment. Others offer substance abuse rehab programs on an outpatient basis which provides a sense of flexibility, though outpatient programs are not always a suitable drug and alcohol abuse rehab program for individuals in Riverwood who are having difficulties with long term drug or alcohol addiction issues. Regardless of whether inpatient or outpatient substance abuse rehabilitation services are chosen, there are varying lengths of time that people will be required to remain in the drug rehabilitation program. For example, many short-term programs offer programs for a month or less, while long-term facilities will demand at least a 12 week stay.