<qa>  What is the name of the drug that is used to treat a chronic illness?Any illness requiring chronic drug therapy with one of the following drugs: Depakote valproic acid, Hismanal astemizole, Propulsid cisapride, Allegra fexofenadine, Seldane terfenadine, Luvox fluvoxamine, Felbamate felbatol, Tiagabine vigabatrin, hepatic enzyme inducers such as Tagamet cimetidine, and -azole antifungals such as Flagyl metronidazole, Diflucan fluconazole, and Nizoral ketoconazole. 