RESUMEN
<p><b>OBJECTIVE</b>To observe dynamically the effect of drugs for clearing heat and removing dampness (CHRD) on biliary components in rabbits with pigment gallstones (PGS).</p><p><b>METHODS</b>Forty rabbits were established into PGS model and randomly divided into 3 groups, the bacterial infection group, the CHRD low-dose group and the CHRD high-dose group. Besides, a normal group was set up with healthy rabbits for control. Changes of total bilirubin (TB), unconjugated bilirubin (UCB), total bile acid (TBA), Ca2+, bacterial and endogenous beta-glucuronidase (beta-Gase) in bile were observed.</p><p><b>RESULTS</b>CHRD drugs significantly decreased the contents of UCB, Ca2+, bacterial and endogenous beta-Gase (P < 0.05), and increased TBA in bile (P < 0.05).</p><p><b>CONCLUSION</b>CHRD drugs have good effect in reducing the lithogenesis of the pigment gallstones.</p>