IRCT2016073029126N1 IRCT 2017-07-30 Vice chancellor for research, Arak University of Medical Sciences The effect of Achillea Millefolium on heavy menstrual bleeding Clinical trial of Comparing the effect of Achillea Millefolium capsules and Mefenamic Acid on the amount and duration of menstrual bleeding in women affected by menorrhagia 2016-02-20 anticipated 90 Complete https://irct.ir/trial/23488 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: This study has been done by triple blind method. To do this, patients, researcher and statistical consultant were not aware of prescribed drug's nature. 90 women using Excel software, were randomly allocated to Achillea Millefolium or control groups. 2 Menorrhagia. Intervention 1: Intervention 1: In control group, Mefenamic acid capsule 500 mg every 8 hours and placebo capsules 500 mg per day every 12 hours, were prescribed from the first day to the end of bleeding up to seven days. Intervention 2: Intervention 2: In Achillea Millefolium group, Mefenamic acid capsules, 500 mg every 8 hours and hydro alcoholic extract of Achillea Millefolium capsules, 500 mg per day every 12 hours,were prescribed, from the first day to the end of bleeding up to seven days.