It is quite common for people who struggle with a psychological disorder to also struggle with a co-occurring drug and alcohol abuse disorder. Frankly, it is more prevalent than one would imagine and quite a few people presently in drug and alcohol treatment facilities in Houston, Texas may have mental health issues which are often undiagnosed. Rehab professionals at successful alcohol and drug rehabilitation facilities in Houston, Texas know how to spot individuals with co-occurring mental and substance abuse issues so that both issues can be simultaneously addressed while the person is in rehab. Simply because both need to be addressed, the person must remain in rehabilitation until they are psychologically stable, not just abstinent.