 - Ongoing treatment with any of the following medications: sotalol Betapace, azimilide Stedicor, quinidine Quinidex, disopyramide Norpace, dofetilide Tikosyn, ibutilide Corvert, procainamide Procanbid, bepridil Vascor, amiodarone Cordarone, clarithromycin Biaxin, erythromycin Eryc, halofantrine Halfan, pentamidine Pentam, sparfloxacin Zagam, domperidone Motilium, droperidol Inapsine, chlorpromazine Thorazine, haloperidol Haldol, mesoridazine Serentil, thioridazine Mellaril, pimozide Orap, arsenic trioxide Trisenox, cisapride Propulsid, lidoflazine Clinium, and methadone Dolophine 