The various substance abuse rehabilitation programs which are accessible to alcohol and drug addicted individuals in Iraan can vary in a lot of various ways. Some alcohol and drug abuse treatment services are offered in a residential or inpatient setting, where clientele reside the entire time they are in rehab which offers a more therapeutic treatment environment. Others offer drug and alcohol abuse treatment programs on an outpatient basis which provides a sense of versatility, although outpatient facilities may not be a suitable alcohol and drug abuse treatment service for individuals in Iraan who are having difficulties with serious drug or alcohol addiction problems. Whether or not inpatient or outpatient alcohol and drug abuse rehabilitation services are selected, there are varying amounts of time that individuals will be expected to remain in the drug rehabilitation center. For instance, some short-term programs offer programs for 4 weeks or less, while long-term centers will require at least a 90 day stay.