As amodiaquine well serves as one of main drugs in the new global strategy of combination therapies for malaria control, following our previous study on synthesis of amodiaquine from 4,7-dichloroquinoline, in this study amodiaquine hydrocloride was experimentally evaluated for acute and subchronic oral toxicity in mice and rabbits. The LD50 of amodiaquine in mice was (689.3 + or - 30.9) mg/kg body weight in single dose administration. In 28 days' subchronic study in rabbits, amodiaquine were administrated at doses of 40mg and 60 mg/kg/day for 28 days on end. After such 28 days' course, blood and tissue samples were taken for hematological, biochemical and histopathological evaluation. All the hematological, biochemical parameters and histophathological signs showed non-significant difference between the treament and control groups
but mild liver congestion, mild hepatis, and mild nephritis were seen in a few individuals.