It is not uncommon for individuals who have problems with a psychological disorder to also have a co-occurring drug and alcohol abuse issue. In fact, it is more widespread than one would imagine and a lot of men and women presently in drug rehab programs in Lancaster, California may have psychological issues which are often undiagnosed. Rehabilitation professionals at effective drug rehabilitation programs in Lancaster, CA. know how to spot individuals with co-occurring psychological and drug and alcohol abuse disorders so that both issues can be simultaneously addressed while the person is in treatment. Simply because both must be resolved, the individual should not leave rehab until they are mentally stable, not just abstinent.