9. Concomitant use of medications known to extend the QTc interval: Quinidine, Procainamide, Disopyramide, Dofetilide, Ibutilide, Sotalol, Amiodarone, Bepridil, Cisapride, Macrolides, Erythromycin, Clarithromycin, Fluoroquinolones, Sparfloxacin, Antiprotozoals, Pentamidine, Antimalarials, Halofantrine, Chloroquine, Phenothiazine neuroleptics, Thioridazine, Chlorpromazine, Mesoridazine, Butyrophenone neuroleptics, Droperidol, Haloperidol, Diphenylpiperidine neuroleptics, Pimozide, Arsenic trioxide, Methadone, Cesium, Licorice, Zhigancao