We assembled 4 groups of investigators with strong track records in bereavement research and extensive experience with intervention studies and multicenter projects, to conduct a study of citalopram (CIT) efficacy. We plan to enroll participants with a primary diagnosis of Complicated Grief and randomly assign them (n=480; 50 at Columbia) to receive treatment with CIT, Placebo (PBO), CIT + CGT or PBO + CGT over a period of approximately 16 weeks. We want to determine whether citalopram shows a better response than placebo, when administered either with or without CGT. We will also address the question of whether CIT performs as well when administered alone as it does when administered with CGT.