It is quite common for men and women who are afflicted with a psychological disorder to also have a co-occurring substance abuse disorder. In fact, it is more widespread than one would think and many men and women currently in drug rehab centers in Fremont, California may have psychological disorders which are often undiagnosed. Rehabilitation specialists at effective drug rehabilitation programs in Fremont know how to identify individuals with co-occurring mental and drug and alcohol abuse disorders so that these two issues can be simultaneously addressed while the individual is in treatment. Due to the fact both need to be addressed, the person should not leave rehabilitation until they are psychologically stable, not just abstinent.