A combination of sorafenib and niclosamide can yield a synergistic combination index (CI) for sorafenib-resistant HCC cells that decrease the expressions of IGF-1R/p-IGF-1R/OCT4, attenuate stemness-related properties, downregulate the glycolysis-associated gene expressions, and reduce the mitochondrial membrane potential in vitro, and decrease tumor size and tumor volume resulting from apoptosis in vivo. This evidence concerns the gene IGF1R and hepatocellular carcinoma.