Hydroxychloroquine may interact with drugs that prolong the QT interval, increasing the risk of cardiac arrhythmias such as ventricular tachycardia or torsades de pointes. Imulast Healthcare providers should carefully assess patients for risk factors for QT prolongation, such as underlying cardiac conditions or concomitant use of other QT-prolonging medications, and consider alternative treatment options or close monitoring when prescribing hydroxychloroquine.