It is quite common for people who struggle with a psychological disorder to also be plagued by a co-occurring drug and alcohol abuse disorder. In fact, it is more widespread than one would assume and many individuals currently in drug and alcohol rehab programs in Ontario, CA. may have psychological disorders which are often undiagnosed. Treatment professionals at successful drug treatment centers in Ontario know how to spot persons with co-occurring psychological and alcohol and drug abuse issues so that both concerns can be handled simultaneously while the person is in rehab. Simply because both need to be addressed, the individual should not leave rehab until they are psychologically stable, not just abstinent.