Concomitant use with QT-prolonging drugs (e.g. quinidine, disopyramide, bepridil, sotalol, ibutilide, amiodarone, pimozide, ziprasidone, sertinole, mefloquine, halofantrine, pentamide, cisapride, erythromycin IV) is not recommended as QT prolongation may be enhanced by heart rate reduction. Concentrations may increase when used with CYP3A4 inhibitors. Use with verapamil or diltiazem (moderate CYP3A4 inhibitors) is not recommended. If used with other moderate CYP3A4 inhibitors (e.g. fluconazole), may consider starting at lower dose and with heart rate monitoring if resting heart rate >60 beats/min. Concentration may be reduced with CYP3A4 inducers (e.g. rifampicin, barbiturates, phenytoin, St John's Wort) and may require Ivabradine dose adjustment. Potentially...
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