The different drug and alcohol abuse treatment services which are accessible to drug and alcohol addicted persons in Evansville, Indiana can vary in several different ways. Some alcohol and drug abuse treatment programs are conducted in a residential or inpatient location, where clients remain the entire time they are in rehab which offers a more conducive rehabilitation environment. Others provide substance abuse rehab services on an outpatient basis which provides a sense of flexibility, though outpatient facilities may not be a suitable drug and alcohol abuse rehab program for individuals in Evansville, Indiana who are struggling with serious drug or alcohol addiction problems. Regardless of whether inpatient or outpatient alcohol and drug abuse treatment services are chosen, there are also different lengths of time that individuals will be expected to stay in the drug and alcohol rehabilitation center. For instance, quite a few short-term programs offer programs for 4 weeks or less, whereas long-term programs will require at least a 90 day stay.