The diverse drug and alcohol abuse rehab services which are accessible to drug and alcohol addicted people in Sunnyvale can vary in several different ways. Quite a few substance abuse rehabilitation services take place in a residential or inpatient location, where clients reside for the duration of their rehab which supplies a more therapeutic rehabilitation environment. Others offer substance abuse treatment services on an outpatient basis which allows for more versatility, although outpatient facilities may not be a suitable substance abuse treatment program for people in Sunnyvale who are having difficulties with long term drug addiction issues. Whether inpatient or outpatient drug and alcohol abuse rehabilitation services are selected, there are also different lengths of time that men and women will be required to continue to be in the drug and alcohol treatment program. For instance, many short-term programs offer programs for 30 days or less, whereas long-term centers will demand at least a 3 month stay.