This medicine is not recommended in patients taking astemizole
. The use of Erythromycin
with terfenadine and astemizole may cause serious heart disorders such as abnormal prolongation of heartbeat (QT/QTc interval prolongation) and abnormal heartbeat originating from lower chambers of the heart. The use of Erythromycin with terfenadine can be possibly fatal. The use of Erythromycin with cisapride may cause prolonged heartbeat (QT prolongation), irregular heartbeat, increased heartbeat, abnormal heart rhythm (ventricular fibrillation) and can be possibly fatal.