Abstract: It is an object of the present invention to provide a method for cancer treatment to suppress cancer, specifically hepato cellular carcinoma. There is discovered effective suppression of the progression of hepatocellular carcinoma with gabexate mesilate, a non-anticancer drug that has not been used as an anticancer drug. Gabexate mesilate in the amount of 100-300 mg dissolved in 150-300 ml of physiological saline or of 5% glucose is administered by intravenous drip infusion. The administration can be carried out noninvasively with little or no pain to patients. Concomitant use with embolization strongly suppresses hepatocellular carcinoma.

Abstract: A hepatitis C virus proliferation inhibitor comprising a bile acid or a physiologically acceptable salt thereof is disclosed, as well as a method for treating a mammal infected with hepatitis C and a pharmaceutical composition for treating hepatitis C. As the bile acid to be used in the present invention, free bile acids, such as ursodeoxycholic acid and chenodeoxycholic acid, and conjugated bile acids such as tauroursodeoxycholic acid are exemplified. Also, as the physiologically acceptable salt, alkali metal salts such as the sodium salt of the bile acid is exemplified.