Abstract with the functions of enriching qi and blood, arresting bleeding and regulating menstruation, granula Baofuxin is effective to the side reactions such as bleeding and lumbar pain caused by the copper - bearing 1UD. The mechanism of arresting bleeding and alleviating pain was studied. The obser-vations included rabbit uterine contraction in vivo, healthy mice bleeding and clotting time, heparin modeled mice bleeding and clotting time,estrum rat FDP,6-k-PGF1α and uterine 6-k-PGF1α,mice hot plate pain alleviating and acetic acid torsion...