Medicines that belong to the group of anti-arrhythmics (e. g. quinidine, hydroquinidine, disopyramide, amiodarone, sotalol, dofetilide, ibutilide), neuroleptics (e. g. phenothiazines, pimozide, sertindole, haloperidol, sultopride), tricyclic antidepressants, some antimicrobials (e. g. sparfloxacin, intravenous erythromycin, pentamidine, antimalarials particularly halofantrine), some antihistamines (e. g. terfenadine, astemizole, mizolastine), and other medicines (e. g. cisapride, intravenous vincamine, bepridil and diphemanil).