We report a case of intravascular hemolysis and methemoglobinemia, precipitated by severe acute respiratory syndrome coronavirus 2 infection, in a patient with undiagnosed glucose-6-phosphate dehydrogenase deficiency. Clinicians should be aware of this complication of coronavirus disease as a cause of error in pulse oximetry and a potential risk for drug-induced hemolysis.
Keywords: COVID-19; G6PD; SARS CoV-2; coronavirus; coronavirus disease; deficiency; glucose-6-phosphate dehydrogenase; hemolytic anemia; methemoglobinemia; respiratory infections; severe acute respiratory syndrome coronavirus 2; viruses; zoonoses.