 3. Treatment with any medication that causes QT prolongation or Torsades de Pointes, including but not limited to: amiodarone, amitriptyline, astemizole, cisapride, citalopram dose greater than 20 mgday, dihydroergotamine, disopyramide, dofetilide, dronedarone, ergotamine, ibutilide, ondansetron or other 5-HT3 5-hydroxytryptamine receptor antagonists, pimozide, procainamide, quinidine, quinine, quinolones, ranolazine, risperidone, sotalol, terfenadine and tolterodine. QT prolonging drugs may be referenced at the CredibleMeds web site: 