Persons with co-occurring mental and substance abuse disorders must address both issues if there is any hope for them to become fully rehabilitated. Some individuals take drugs or alcohol to alleviate symptoms of mental health complications, and some people take drugs which then, in turn, brings about symptoms which mimic mental health issues, such as anxiety and depression. Addiction treatment professionals know how to distinguish between the two, and can work with clients to correctly treat real mental health problems 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 happy.