The various substance abuse treatment services which are available to drug addicted people in California, Missouri can differ in a lot of different ways. Some drug and alcohol abuse treatment programs are offered in a residential or inpatient facility, where clientele reside for the duration of their rehab which offers a more conducive treatment setting. Others offer drug and alcohol abuse rehab programs on an outpatient basis which allows for more flexibility, although outpatient centers may not be a suitable substance abuse rehabilitation program for men and women in California, Missouri who are struggling with serious drug addiction problems. Whether or not inpatient or outpatient substance abuse rehabilitation services are selected, there are also different lengths of time that men and women will be expected to stay in the drug rehab center. For instance, many short-term programs offer services for 30 days or less, while long-term facilities will require at least a 12 week stay.