Randomization to sertraline (a SSRI) or nortriptyline (a TCA) is stratified by the presence or absence of melancholia. Outcome measures for the 12-week acute phase include clinician and patient ratings of symptoms, side effects, and an evaluation of the health-related quality of life (HRQOL). At the end of the acute treatment phase, patients who meet criteria for clinical response participate in a 6-month continuation phase.