SSRIs are effective in the treatment of major depression. However, there is also evidence that SSRIs may be significantly less effective than TCAs for depressed patients with melancholia. This issue is of particular concern in late-life major depression. SSRIs have important safety advantages with respect to overdose and a benign cardiovascular profile. Furthermore, the SSRIs do not have significant anticholinergic effects, and appear to be better tolerated than the TCAs. Perhaps most important, the SSRIs currently are prescribed widely as the medication treatment of first choice for major depression in late life. Therefore, if it were determined that SSRIs are considerably less effective than TCAs in the treatment of melancholia in the elderly, there would be significant ramifications for clinical practice.