Cisapride should not be used concomitantly with other drugs known to prolong the QT interval: certain antiarrhythmics, including those of Class IA (such as quinidine and procainamide) and Class III (such as sotalol);
<Cisapride, advise, antiarrhythmics>, <Cisapride, advise, quinidine>, <Cisapride, advise, procainamide>, <Cisapride, advise, sotalol>