It is not uncommon for people who have problems with a psychological issue to also be plagued by a co-occurring alcohol and drug abuse disorder. In fact, it is more prevalent than one would assume and a lot of people currently in drug treatment centers in Marquez may have psychological issues which have just simply been undiagnosed. Treatment experts at successful drug and alcohol rehabilitation centers in Marquez know how to identify individuals with co-occurring mental and drug and alcohol abuse disorders in hopes that both concerns can be handled simultaneously while the person is in rehabilitation. Due to the fact both must be resolved, the individual must remain in treatment until they are psychologically stable, not just abstinent.