7 -type active intrauterine device (IUD) is made of pure copper and stainless steel together with indomethacin for blood loss control. Galvanic corrosion behavior of the two dissimilar metals in the absence and presence of indomethacin were compared in physiological saline with pH 6-8. Indomethacin did not affect corrosion potential of copper, but caused stainless steel a slight potential shift towards positive. With increasing pH of the media, copper potential shifted towards positive, whereas stainless steel potential shifted towards negative. Indomethacin did not change these dependence. In the copper/stainless steel couple, copper acted as anode. Anodic polarization behaviour of copper was not altered by indomethacin, but its cathodic polarization curve was moved up. Indomethacin increased the galvanic current significantly. It was also noticed that stainless steel might be activated due to improper handling of the IUD. In this case, copper became cathode of the couple and its corrosion would be suppressed. Indomethacin did not turn the stainless steel from active state into passive state.