The diverse drug and alcohol abuse treatment programs which are offered to alcohol and drug addicted people in Ottawa can vary in many various ways. Quite a few drug and alcohol abuse treatment programs take place in a residential or inpatient setting, where clients reside the entire time they are in treatment which provides a more therapeutic rehabilitation environment. Others provide substance abuse rehabilitation programs on an outpatient basis which allows for more flexibility, though outpatient centers may not be a suitable drug and alcohol abuse rehabilitation program for people in Ottawa who are having difficulties with serious addiction difficulties. Regardless of whether inpatient or outpatient drug and alcohol abuse rehab services are selected, there are varying lengths of time that individuals will be expected to continue to be in the alcohol and drug rehabilitation program. For example, many short-term programs offer services for 4 weeks or less, whereas long-term facilities will demand at least a 12 week stay.