The various drug and alcohol abuse treatment services which are accessible to alcohol and drug addicted people in Paris can vary in many various ways. Quite a few drug and alcohol abuse rehabilitation programs are offered in a residential or inpatient location, where individuals remain for the duration of their rehabilitation which offers a more therapeutic treatment environment. Others provide alcohol and drug abuse treatment services on an outpatient basis which provides a sense of flexibility, though outpatient facilities may not be a suitable substance abuse rehabilitation program for people in Paris who are having difficulties with serious addiction difficulties. Whether or not inpatient or outpatient alcohol and drug abuse rehab services are selected, there are varying lengths of time that individuals will be required to remain in the drug rehabilitation facility. For example, many short-term programs offer services for a month or less, while long-term programs will require at least a 12 week stay.