There are several others also scientifically proven. The list is long. Dr. Weil reports that many people with Fibromyalgia are put on anti-depressants. He feels anti-depressants lose their effectiveness after a period of time though. Many authors including Dr. Weil feel Fibromyalgia is either a stress related disease or stress is a major factor in the disease and highly recommend relaxation techniques such as meditation, progressive relaxation and breathing exercises.
Many authors also recommend regular massage therapy.
I always emphasize that herbs work best when included in a holistic approach to health. Holistic means integrating mind, body and soul. Science is beginning to prove that your mind has an effect on your body and vice versa. I love that Andrew Weil writes that you can reduce pain by changing the way you think about life. You can learn to recognize negative ways of thinking and convert them to positive views.