What is the difference between a clinical psychologist and a psychiatrist?

The two professions often deal with similar problems of mental health - one from a psychological approach and the other from a medical approach. However, clinical psychology is a health profession broadly concerned with improving the effectiveness of human behavior in many settings. Psychiatry is a medical specialty which focuses primarily on mental disorders. In addition to treating nervous and mental disorders, clinical psychologists as well as some psychiatrists focus on the prevention and treatment of numerous other health disorders. They also develop programs which focus on promoting and maintaining health. Clinical psychologists further may work with persons who are concerned with personal growth or who are dealing with developmental, life or situational crises and they help persons learn to relax and handle stresses more effectively.

 (Ohio Psychology Publications, Inc. 2006)