Objective To observe the curative effect of treating leukocyte decreasing of parts of chronical hepatitis B or hepatitis C caused by interferon by diyushengbai tablet.Methods 57 subjects of patients were divided into two groups randomly,the research group:30 subjects were cured by diyushengbai tablet,and the control group:27 subjects were cured by vitami B_4.Both of their course of treatment were two weeks.Then total effective rates of leukocyte count in peripheral blood were compared before treatment and after treatment.Results The leukocyte in research group raised much more obviously than the control group,and the total effective rates separately were 83.33%(25/30) and 70.37%%(19/27),there was notable diversity(P