It is quite common for individuals who have problems with a psychological issue to also be plagued by a co-occurring substance abuse issue. In fact, it is more common than one would think and many individuals presently in drug rehabilitation centers in South Houston, Texas may have psychological disorders which are often undiagnosed. Treatment specialists at successful drug rehab programs in South Houston, Texas know how to identify individuals with co-occurring mental and drug and alcohol abuse disorders in hopes that both issues can be handled simultaneously while the individual is in rehab. Due to the fact both need to be addressed, the client must remain in treatment until they are mentally stable, not just off of drubs.