The diverse alcohol and drug abuse treatment programs which are offered to drug and alcohol addicted people in Monrovia, CA. can differ in several different ways. Quite a few drug and alcohol abuse rehab services are offered in a residential or inpatient location, where individuals reside the entire time they are in rehab which provides a more conducive treatment environment. Others provide substance abuse treatment programs on an outpatient basis which provides a sense of versatility, although outpatient facilities may not be an appropriate alcohol and drug abuse treatment service for people in Monrovia, CA. who are having difficulties with serious addiction difficulties. Whether or not inpatient or outpatient substance abuse rehabilitation programs are chosen, there are varying amounts of time that individuals will be required to remain in the drug rehabilitation facility. For example, quite a few short-term programs offer programs for 4 weeks or less, while long-term facilities will demand at least a 90 day stay.