The diverse drug and alcohol abuse rehab programs which are offered to drug and alcohol addicted persons in Knoxville can vary in a lot of different ways. Quite a few alcohol and drug abuse treatment services take place in a residential or inpatient setting, where clients remain the entire time they are in rehab which provides a more conducive rehabilitation setting. Others offer drug and alcohol abuse treatment services on an outpatient basis which provides a sense of flexibility, though outpatient facilities may not be a suitable alcohol and drug abuse rehab program for men and women in Knoxville who are having difficulties with long term drug or alcohol addiction problems. Regardless of whether inpatient or outpatient alcohol and drug abuse rehabilitation programs are selected, there are varying lengths of time that men and women will be asked to continue to be in the drug and alcohol rehabilitation center. For example, some short-term programs provide programs for 4 weeks or less, whereas long-term programs will require at least a 3 month stay.