R_x: Finding Drug Information

A 61 year old kidney transplant patient describes feeling “blue” and unmotivated lately. He thinks he might be getting a little depressed and would like to do something about it. He recently spoke with relatives in Europe who suggested he start taking St. John's Wort. He wants to know what you think about this and if it will affect his immunosuppressive therapy. You review his chart and note that his immunosuppressive therapy includes cyclosporine, azathioprine, and prednisone.