Book excerpt: Though millions of depressed Americans take Prozac safely and successully, many others suffer uncomfortable or even dangerous side effects. But they needn't despair: In this comprehensive guide to relieving depression without pharmaceuticals, Michael Murray, N.D., explains the disorder itself and various exacerbating factors, including tobacco, alcohol, and caffeine; lists a range of new treatments known to produce the theraputic effects of Prozac, from St. John's Wort and Ginkgo Biloba extract to exercise programs and guided imagery, as well as the pros and cons of the much-touted "miracle drug" melatonin. Filled with detailed, practical information, this is a useful resource for anyone seeking an alternative to Prozac.