OUTLINE: This is a randomized, placebo controlled study. Patients are randomized to one of two treatment arms. Arm I: Patients receive oral Hypericum perforatum (St. John's Wort) 3 times a day. Arm II: Patients receive an oral placebo 3 times a day. Treatment continues for 6 weeks in the absence of worsening symptoms or unacceptable toxicity. Patients complete the Profile of Mood States (POMS) and the Brief Fatigue Inventory at the beginning and end of the study.