The various drug and alcohol abuse rehabilitation programs which are accessible to drug and alcohol addicted individuals in Oakland can vary in many different ways. Some substance abuse rehab programs are conducted in a residential or inpatient setting, where clientele remain for the duration of their treatment which provides a more conducive treatment environment. Others offer substance abuse rehab services on an outpatient basis which provides a sense of flexibility, although outpatient facilities may not be an appropriate drug and alcohol abuse treatment service for men and women in Oakland who are struggling with long term addiction difficulties. Whether or not inpatient or outpatient substance abuse treatment services are chosen, there are also different amounts of time that people will be required to stay in the drug and alcohol rehab facility. For example, some short-term programs offer services for 30 days or less, whereas long-term programs will call for at least a 90 day stay.