The different alcohol and drug abuse rehabilitation services which are accessible to drug and alcohol addicted individuals in Greenville, Illinois can vary in a lot of various ways. Some drug and alcohol abuse rehab programs are conducted in a residential or inpatient facility, where clients remain for the duration of their rehab which offers a more conducive treatment environment. Others offer drug and alcohol abuse rehab programs on an outpatient basis which allows for more flexibility, though outpatient centers may not be an appropriate substance abuse rehab service for people in Greenville, Illinois who are struggling with serious drug addiction issues. Regardless of whether inpatient or outpatient alcohol and drug abuse rehab services are chosen, there are also different lengths of time that individuals will be expected to remain in the drug and alcohol rehabilitation center. For instance, some short-term programs provide services for 4 weeks or less, whereas long-term facilities will demand at least a 12 week stay.