Major depression is often a chronic and recurrent disorder. Findings f
rom a landmark study, the Pittsburgh Study of Maintenance Therapies in
Recurrent Depression, demonstrate that full doses of antidepressants
prevent recurrent depression and that maintenance therapy lasting at l
east 5 years may be required for patients with severely recurrent dise
ase. Ln addition, psychotherapy is a useful adjunct to antidepressant
maintenance therapy in prolonging the duration between recurrent episo
des. The currently accepted approach to preventing recurrent depressio
n is to treat the acute episode to full remission and follow up by mai
ntaining the patient on the full, acute dose used to achieve the initi
al response. The selective serotonin reuptake inhibitors (SSRIs) have
been studied in recurrent depression and are rational choices for init
ial maintenance therapy because of demonstrated efficacy, safety, and
tolerance during long-term therapy.