The current study was performed to evaluate the effect of acute and chronic hepatotoxicity induced by paracetamol and thioacetamide respectively on serum hormonal levels and biochemical parameters. Female Wistar albino rats were divided into 3 equal groups (C), (P) and (T). Group (C) were kept as control, group (P) were received paracetamol orally (500 mg/kg b.wt) daily for 15 days and those of group (T) were injected thioacetamide (200 mg/kg b.wt) intraperitonialy twice/ week for 90 days. In P group, results revealed significant elevation in liver enzyme activities (ALT, AST and ALP), T4, insulin (7th day), estrogen (7th and 15th days), triglycerides (7th day) and cholesterol levels throughout the experiment while serum proteins and T4 (15th day) showed significant decreased values. Whereas, at 90th days of chronic intoxicated group (T) resulted in significant elevation in liver enzyme activities (ALT, AST and ALP), bilirubin, estrogen, T4, triglycerides (60th and 90th days) and T3 (120th day). While the levels of T4 and cortisol (60th day), serum total protein, albumin, globulin (90th day) and insulin (120th day) showed significant decreased values when compared to control group. In conclusion, both paracetamol and thioacetamide cause different degrees of damage in liver of rats leading to clear changes in their hormonal and biochemical profiles.