The different substance abuse rehabilitation services which are offered to drug addicted persons in Berlin can differ in many various ways. Some substance abuse rehabilitation programs take place in a residential or inpatient location, where individuals reside for the duration of their treatment which offers a more therapeutic rehab environment. Others provide alcohol and drug abuse rehab programs on an outpatient basis which provides a sense of flexibility, although outpatient facilities may not be a suitable drug and alcohol abuse treatment service for men and women in Berlin who are having difficulties with serious drug or alcohol addiction problems. Whether inpatient or outpatient substance abuse rehab programs are selected, there are also different amounts of time that men and women will be asked to remain in the drug and alcohol rehab program. For instance, some short-term programs provide programs for 30 days or less, while long-term programs will demand at least a 12 week stay.