It's action appears to be the same as may prescription antidepressants in that it increases the availability of seratonin in the brain. If you decide to try it, do not take it with a prescription antidepressant. Check with your physician. It also comes in tea form. It is not a panacea.
Research also shows that depression is alleviated best by combination of therapy andantidepressant.
Valerian Valerian root or valerian complex is used to aid in calming and especially for sleep. Some popular forms are the Valerian Complex with Valerian, Kava Kava, Cammomile and Passion flower, and are taken at least once during the day tend twice at night. Follow label directions and check with your physician. You may have to educate him or her about these products. Not much research is available on this one, but some have found it very effective.