It is not uncommon for individuals who have problems with a mental health issue to also have a co-occurring substance abuse issue. In fact, it is more widespread than one would imagine and many people presently in drug treatment centers in Hamilton may have psychological disorders which have just simply been undiagnosed. Rehab specialists at successful drug rehabilitation centers in Hamilton know how to spot persons with co-occurring mental and substance abuse issues so that these two issues can be simultaneously addressed while the person is in treatment. Due to the fact both need to be addressed, the client must remain in rehab until they are mentally stable, not just sober.