What are the possible adverse effects of antimalarial drugs for the treatment of malaria?

Updated: Jun 03, 2020
  • Author: Thomas E Herchline, MD; Chief Editor: Michael Stuart Bronze, MD  more...
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Antimalarials can cause significant prolongation of the QT interval, which can be associated with an increased risk of potentially lethal ventricular dysrhythmias. Patients receiving these drugs should be assessed for QT prolongation at baseline and carefully monitored if this is present. Patients with normal QT intervals on electrocardiogram (ECG) may not be at a significantly increased risk for drug-induced dysrhythmia, but caution is advised, particularly if the patient is taking multiple drug regimens or if he or she is on other drugs affecting the QT interval.

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