Serum ALT activity of rat treated with cyclophosphamide and 5-fluorouracil and their combination. Significance at P>0.05. CPA: cyclophosamide; 5-FU: Fluorouracil. a Comparison of control and other groups; b Comparison of CPA and other groups; c Comparison of 5-FU and other groups; d Comparison of CPA–5-FU and other groups.