- Daily oral steroid treatment, warfarin, cyclosporine (neural, sandimmune), digoxin, fexofenadine, paclitaxel, diltiazem, saquinavir, selected chemotherapeutic agents (etoposide, vinblastine, vincristine, vindesine), antifungals (ketoconazole, itraconazole), protease inhibitors (amprenavir, indinavir, nelfinavir), verapamil, oral glucocorticoids, erythromycin, quinidine