Sometimes the best treatment is no treatment at all.

A Case in Point for the Maxim 'Do No Harm'
By RICHARD A. FRIEDMAN, M.D.
Published: May 30, 2006

...It will sound heretical coming from a psychiatrist, but there are some patients who feel worse and get worse when they are in psychotherapy. For some, the problem is getting the wrong type of treatment; for others, it may be the relationship with the therapist that is problematic, regardless of the specific treatment...

From The New York Times (registration required)
http://www.nytimes.com/2006/05/30/health