This report describes a case of torsades de
pointes induced when mosapride was administrated
with flecainide in the presence of hypokalemia.
Although the mechanism of torsades
de pointes associated with QT prolongation induced
by mosapride is unclear, we should consider
the occurrence of torsades de pointes when
prescribing mosapride in combination with antiarrhythmic
agents, and the monitoring of QT intervals
in electrocardiography because of these adverse
effects.