Based on reference materials.
From the blog:
"Which is why a 2011 survey reports that approximately 90% of arthritic patients employ alternative therapies like herbal medicines for common rheumatic conditions including fibromyalgia.  Below are 10 herbal remedies thought beneficial for fibromyalgia. "
Like chamomile, valerian is also an herbal relaxant. When researchers in Germany studied whether bathing in water containing valerian oil have an effect on pain, sleeplessness and tender point count, out-patients with generalized fibromyalgia reported significant improvements in their well-being and sleep while tender point count also decreased significantly. 
St. John's Wort
While no specific study has claimed St. John's Wort success in treating fibromyalgia, several researches have shown St. John's Wort as more effective than placebo in treating depression that commonly accompanies fibromyalgia.  Other sources show that this herb can be as effective as antidepressants like Prozac in alleviating mild depression  - however claims of no side effects should be met with caution as St. John's wort does have the potential for side effects and can can cause adverse reactions if combined with several prescription medications.
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