Persons with co-occurring mental and substance abuse disorders must address both issues in order to become fully rehabilitated. Some people take drugs or alcohol to alleviate symptoms of mental health disorders, and some people take drugs which then, in turn, brings about symptoms which mimic mental health issues, such as depression and anxiety. Drug treatment professionals know how to distinguish between the two, and can work with clients to appropriately treat real mental health disorders in tandem with any other substance abuse treatment that is done with the person. This has proven to be effective in keeping people with mental health issues off of drugs and mentally stable and productive.