Sustaining Remission of Psychotic Depression

The original STOP-PD study established that the combination of olanzapine and sertraline was significantly better than olanzapine alone in achieving remission of psychotic depression. This STOP-PD-II Sustaining Remission study aims to assess the long-term tolerability of taking this combination of medications and their efficacy at preventing a relapse of the symptoms. The acute phase of the study will monitor the efficacy and tolerability of the olanzapine and sertraline combination, including investigation of weight and metabolic variables, age effects on treatment response and tolerability, and the association of genetic polymorphisms to response or relapse. When subjects are stabilized on these medications for a period of 8 weeks they will be invited to participate in the randomized phase of the research: the olanzapine will be placebo-controlled, meaning half of the subjects will continue to take the olanzapine/sertraline combination and half will take a sertraline/placebo combination, for a period of 36 weeks. Symptoms and side effects will be monitored regularly throughout this phase. Randomization will be stratified on a 1:1 basis by age 60 and above.