It is quite common for people who struggle with a psychological issue to also be plagued by a co-occurring alcohol and drug abuse issue. In fact, it is more common than one would assume and many individuals currently in drug and alcohol treatment programs in Cupertino, CA. may have mental health disorders which have just simply been undiagnosed. Rehab experts at proven alcohol and drug rehab programs in Cupertino, California know how to identify individuals with co-occurring psychological and substance abuse disorders in hopes that both issues can be handled simultaneously while the person is in rehab. Simply because both must be resolved, the individual should not leave rehab until they are mentally stable, not just sober.