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 ease symptoms of mental health complications, and some people take drugs which then, in turn, causes symptoms which are identical to mental health disorders, such as anxiety and depression. Drug treatment professionals know how to differentiate between the two, and can work with clients to properly treat real mental health conditions 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 disorders off of drugs and mentally stable and happy.