The diverse drug and alcohol abuse rehab programs which are available to alcohol and drug addicted persons in Larkspur can vary in many various ways. Some alcohol and drug abuse rehabilitation programs are conducted in a residential or inpatient setting, where clients reside for the duration of their rehabilitation which provides a more therapeutic treatment environment. Others provide drug and alcohol abuse rehabilitation services on an outpatient basis which allows for more flexibility, though outpatient centers are not always a suitable substance abuse rehabilitation service for people in Larkspur, CA. who are having difficulties with long term drug addiction issues. Whether or not inpatient or outpatient substance abuse rehabilitation programs are chosen, there are varying amounts of time that people will be asked to remain in the drug and alcohol rehab program. For example, some short-term programs provide services for 4 weeks or less, while long-term programs will call for at least a 3 month stay.