Objective: To assess the therapeutic effect and safety of Gongmo Kang capsule (GKC) in treating metrorrhagia (with blood stasis syndrome) caused by drug - induced abortion. Methods: A randomized double - blind controlled design was adopted. One hundred and five patients were treated with GKC, and other 104 patients in the control group with Gongxue Ning capsule (GNC). Results: In GKC group, the remarkably effective rate was 73. 33%, the total effective rate was 85. 70% ; the remarkably effective rate for improving syndromes was 80.00% and the total effective rate was 88.57% ; the mean bleeding period was (4.46 ? 1.71) days. GKC appeared to be more effective than GNC (P