Objective:To observe the situation of repeated administration and withdrawal of Schisandra superfine powder and common powder. Methods: 140 rats were randomLy divided into 7 groups according to sex and weight, each group of male and female 10 each. The changes of the general condition, body weight, hematological parameters, blood biochemical indexes, organ coefficient and histopathology of the rats were observed during 4 weeks and 2 weeks after drug withdrawal. Results:The body weight, hematological parameters, blood biochemical indexes,orga...