Diagnostic pitfalls and laboratory test interference after hydroxychloroquine intoxication: A case report

Abstract Hydroxychloroquine overdose can cause hypokalemia. Hydroxychloroquine overdose can result in electrocardiographic abnormalities. Hydroxychloroquine can interfere with urine chemistry and drug screening assays. Urine concentrations of hydroxychloroquine can exceed 500 mg/L in acute overdose. Article type: Case Report Keywords: Arrhythmias, Drug overdose complications, Electrocardiography, Hydroxychloroquine adverse effects, Hypokalemia, Norepinephrine therapeutic use Authors: Joshua B. Radke, Jennie M. Kingery, Jon Maakestad, Matthew D. Krasowski Affiliations: Department of Emergency Medicine, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA,