I have used maintenance CT or "booster sessions" for several years now. This has proven, at least in my experience, to be a useful intervention in the prevention of depressive relapse. I have followed patients out to 24 months post treatment and have only had some 15-25% reporting significant return of depressive symptoms. Of course I am working with a very small sample and not at all randomly selected. I am just reporting what I have seen in practice. Only 3 of those thirty individuals that I have followed have remained on antidepressants all the others discontinuted medications within three months. One individual out of the three that elected to keep taking meds had a relapse.