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This study was designed to investigate the hypoglycemic, antilipidemic and antioxidant effects of valproic acid (VA) in alloxan-induced diabetic rats. VA (100, 300 and 600 mg/kg p.o.) and insulin (17 IU/kg s.c.) were administered once daily for 21 days. Fasting blood glucose level was determined at 7 days interval. On day 21, blood samples were collected for assay of serum biochemical parameters (total protein, creatinine, urea, alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), triglycerides (TG), total cholesterol (TC), high density lipoprotein (HDL), and low density lipoprotein (LDL)). Kidneys and livers were harvested for antioxidant indices and histopathological examination. In diabetic rats, VA produced a dose and day-dependent reduction in glucose level. Peak effect (52.79% reduction; P<0.001) was produced at the dose of 600 mg/kg on day 21. In normoglycemic rats, VA …