Briefly described, embodiments of this disclosure include compounds, pharmaceutical compositions, methods of treating a host infected with a virus from the Flaviviridae family of viruses, methods of inhibiting HCV replication in a host, methods of inhibiting the binding of NS4B polypeptide to the 3′UTR of HCV negative strand RNA in a host, methods of treating liver fibrosis in a host, and the like. In an embodiment, the compounds can include clemizole or a clemizole analog, or a pharmaceutically acceptable salt, an isomer, a tautomer, or a prodrug thereof.