Persons with co-occurring mental and substance abuse disorders must address both issues in order to become fully rehabilitated. Some individuals take drugs or alcohol to relieve symptoms of mental health problems, and some people take drugs which then, in turn, causes symptoms which are identical to mental health disorders, such as anxiety and depression. Addiction 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 individual. This has proven to be effective in keeping individuals with mental health issues off of drugs and mentally stable and healthy.