The patient had been treated with hydroxychloroquine for two years prior to presentation. After thorough workup for secondary causes of QT interval prolongation hydroxychloroquine was discontinued and the patient’s QT interval shortened. What companies make hydroxychloroquine Plaquenil less headaches Long term plaquenil therapy QT Interval prolongation Hydroxychloroquine has the potential to prolong the QTc interval in patients with specific risk factors. Hydroxychloroquine should be used with caution in patients with congenital or documented acquired QT prolongation and/or known risk factors for prolongation of the QT internal such as • advanced age, Make sure your doctor knows if you had a heart rhythm problem such as QT prolongation. This medicine may cause muscle and nerve problems. Check with your doctor right away if you have muscle weakness, pain, or tenderness while using this medicine. Hydroxychloroquine may cause some people to be agitated, irritable, or display other abnormal behaviors. Of the documented medications known to cause QT interval prolongation hydroxychloroquine HCQ is extremely rare in the literature. HCQ is an antimalarial that has become the cornerstone for treatment of systemic lupus erythematosus SLE 9. The patient was noted to have mild prolongation of the QT interval on electrocardiogram prior to initiation of hydroxychloroquine therapy which was exacerbated by its use and may have been caused due to toxicity from underlying renal failure. The patient was treated with mexiletine to prevent sudden ventricular arrhythmias, which was unique compared to other documented cases in which lidocaine was used. Hydroxychloroquine qt prolongation Plaquenil hydroxychloroquine sulfate dose, indications., Hydroxychloroquine Oral Route Precautions - Mayo Clinic Plaquenil and ssriAshwagandha and plaquenilHydroxychloroquine brand name canadaHydroxychloroquine for tall thin patient Hydroxychloroquine sulfate tablets are indicated for the treatment of chronic discoid lupus erythematosus and systemic lupus erythematosus in adults. Rheumatoid Arthritis. Hydroxychloroquine sulfate tablets are indicated for the treatment of acute and chronic rheumatoid arthritis in adults. DailyMed - HYDROXYCHLOROQUINE SULFATE tablet, film coated. Life Threatening Severe QTc Prolongation in Patient with.. Chloroquine and Hydroxychloroquine • LITFL • Toxicology.. Plaquenil® hydroxychloroquine sulfate is a white or practically white, crystalline powder, freely soluble in water; practically insoluble in alcohol, chloroform, and in ether. The chemical name for hydroxychloroquine sulfate is 2-4-7-Chloro-4-quinolylaminopentylethylamino ethanol sulfate 11. Background/Purpose Hydoxychloroquine HCQ is widely used for the treatment of rheumatoid arthritis RA and systemic lupus erythematosus SLE with a side-effect profile including myopathy and cardiotoxicity. Acute HCQ poisoning has been reported to cause a prolonged QT interval, hypokalaemia and a prolonged QRS complex. RA itself is an independent risk factor for cardiovascular CV Hydroxychloroquine HCQ is used for treatment of lupus erythematosus. The cardiac toxicity of HCQ has focused primarily on acute intoxication. We report a case of chronic use of HCQ associated with torsade de pointes. Case report. A 67-year-old female presented with acquired long QT interval syndrome with a refractory ventricular arrhythmia.