In a double-blind, randomized, placebo controlled trial, 100 women tested valerian to treat dysmenorrhea, or severe menstrual pain. In that study, the group that used valerian, showed a significant reduction in pain compared to placebo. Furthermore, there were no adverse effects associated with valerian treatment.
Valerian is particularly well known for its mildtranquilizing and sedative effects, helping relieve stress, decrease irritability, and support healthy sleep.