As a medical doctor, a psychiatrist is qualified to prescribe medications to treat an array of mental health disorders including depression, schizophrenia, bi-polar disorder, anxiety, insomnia, and attention deficit / hyperactivity disorder (ADHD). All mental health conditions requiring medication as part of the management would fall to a psychiatrist. However, combining medication with therapy can have improved results. The American Psychological Association adopted a resolution citing more than 50 peer-reviewed studies indicating While medication is appropriate in some instances, research shows that a combination of medication and psychotherapy is often most effective in treating depression and anxiety.