Caution is advised when prescribing INVEGA with medicines known to prolong the QT interval, e. g., class IA antiarrhythmics (e. g., quinidine, disopyramide) and class III antiarrhythmics (e. g., amiodarone, sotalol), some antihistaminics, some other antipsychotics and some antimalarials (e. g., mefloquine).