This study is conducted to determine the effect of Achillea Millefolium capsule on menorrhagia. In this clinical trial, 90 women with complaint of heavy menstrual bleeding were selected and after a control cycle for evaluating the primary bleeding volume, were randomly allocated to Achillea Millefolium or control groups. Inclusion criteria: Affected by menorrhagia, No history of known systemic or pelvic inflammatory diseases, Not pregnant, No consumption of specific medications,No abnormal pap smear or ultrasonography, No history of sensitivity to medicinal plants.
Exclusion criteria: sensitivity to the study medications, Failure to adhere to prescribed treatment, , Unwilling to continue participation in the study,Tacking any herbal or chemical drug during the study. Both groups were subjected to mefenamic acid capsule with 500 mg every 8 hours,from the first day to the end of bleeding,up to seven days, for two consecutive cycles.In Achillea Millefolium group, , in addition to mefenamic acid, Achillea Millefolium capsules, two capsules every 12 hours per day,from the first day to the end of bleeding,up to seven days , were prescribed.In control group, instead of Achillea Millefolium capsules,placebo of Achillea Millefolium was prescribed with the same order. Data on the amount and duration of bleeding were checked and compared before and after treatment.