The various substance abuse treatment services which are available to drug and alcohol addicted people in Hollis can vary in many different ways. Some alcohol and drug abuse treatment programs take place in a residential or inpatient facility, where clients remain the entire time they are in rehabilitation which offers a more conducive rehab environment. Others offer drug and alcohol abuse rehab programs on an outpatient basis which allows for more flexibility, though outpatient centers may not be a suitable substance abuse treatment program for people in Hollis who are struggling with serious addiction issues. Whether or not inpatient or outpatient substance abuse rehab programs are chosen, there are varying amounts of time that people will be required to continue to be in the drug and alcohol rehabilitation facility. For example, quite a few short-term programs provide programs for 4 weeks or less, whereas long-term centers will call for at least a 90 day stay.