The effect of an Iranian herbal drug on primary dysmenorrhea: a clinical controlled trial.

Our objective was to examine the effect of an Iranian herbal drug in the treatment of primary dysmenorrhea. A randomized, double-blind, placebo-controlled pilot trial among 180 female students at Isfahan University dormitory aged 18 to 27 who suffered from primary dysmenorrhea was undertaken. The participants were randomly divided into three groups: herbal drug, mefenamic acid, and placebo.