RESUMEN
<p><b>OBJECTIVE</b>To investigate the efficacy and possible action mechanism of Qianlie Beixi Capsule in the treatment of unliquefiable semen.</p><p><b>METHODS</b>A total of 240 patients with unliquefiable semen were randomly divided into a treatment group (n = 180), treated with Qianlie Beixi Capsule, and a control group (n = 60), given compound tablets of zinc and protein. The treatment lasted two courses of 45 days each, and the seminal changes were observed and recorded.</p><p><b>RESULTS</b>Of the patients in the treatment group, 144 were cured, 12 responded and 24 failed to respond to the medication after the first course; and 158 were cured, 7 responded and 15 failed to after the second course, with the effectiveness rate of 91.67%. Meanwhile, sperm motility was obviously improved, with statistically significant difference from that of the controls (P < 0.01).</p><p><b>CONCLUSION</b>Qianlie Beixi Capsule is effective for unliquefiable semen by improving the function of the prostate and shortening the time of seminal liquefaction.</p>