 - Concurrent use of other antidepressants, with the exception of trazodone 100mgday for sleep, or amitriptyline in doses 50 mg daily for pain. Patients may remain on concomitant benzodiazepines 2 mgd clonazepam or its equivalent, or sleep aids i.e., trazodone, zolpidem Ambien, zaleplon Sonata as long as the drug therapy was initiated at 1 week prior to randomization; the dose will be held constant through the study, and will be controlled for in the analysis. 