Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Hydroxychloroquine nsaid Plaquenil and prednisone Cardiac disorders Cardiomyopathy which may result in cardiac failure and in some cases a fatal outcome see WARNINGS and OVERDOSAGE. PLAQUENIL prolongs the QT interval. Ventricular arrhythmias and torsade de pointes have been reported in patients taking PLAQUENIL see OVERDOSAGE and DRUG INTERACTIONS. Cardiac Effects, including Cardiomyopathy and QT prolongation Postmarketing cases of life-threatening and fatal cardiomyopathy have been reported with use of Plaquenil as well as with use of chloroquine. Patients may present with atrioventricular block, pulmonary hypertension, sick sinus syndrome or with cardiac complications. Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Plaquenil cardiac Maternal Use of Hydroxychloroquine is Associated with a., Plaquenil - FDA prescribing information, side effects and uses Hydroxychloroquine salePlaquenil sleepCan you drink coffee while on plaquenilPictures of chloroquine tabletsHydroxychloroquine side effects eye PLAQUENIL prolongs the QT interval and should not be administered with other drugs that have the potential to induce cardiac arrhythmias. Also, there may be an increased risk of inducing ventricular arrhythmias if PLAQUENIL is used concomitantly with other arrhythmogenic drugs. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. What Conditions does Plaquenil Treat? - WebMD. Plaquenil Disease Interactions -. Plaquenil is used to treat or prevent malaria and to treat the symptoms of rheumatoid arthritis. Learn about side effects, interactions and indications. Skip to Content The American Heart Association is qualified 501c3 tax-exempt organization. *Red Dress ™ DHHS, Go Red ™; AHA; National Wear Red Day ® is registered trademark. Find information about common, infrequent and rare side effects of Plaquenil Oral.