The different drug and alcohol abuse rehab services which are offered to drug and alcohol addicted people in Gwynedd can vary in a lot of different ways. Quite a few substance abuse treatment services are offered in a residential or inpatient setting, where clientele remain for the duration of their rehab which offers a more conducive rehabilitation setting. Others offer substance abuse treatment services on an outpatient basis which provides a sense of flexibility, although outpatient centers are not always an appropriate drug and alcohol abuse rehab program for people in Gwynedd who are having difficulties with long term addiction difficulties. Regardless of whether inpatient or outpatient substance abuse rehab services are selected, there are also different lengths of time that men and women will be expected to stay in the alcohol and drug rehabilitation program. For instance, quite a few short-term programs offer programs for 4 weeks or less, while long-term centers will demand at least a 3 month stay.