1921
Volume 80, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

Primaquine (PQ) is recommended to prevent relapses in patients with malaria infection. However, treatment with PQ causes methemoglobinemia. In this study, we measured the methemoglobin (MetHB) levels in three groups of subjects who received PQ treatment at 0.58, 0.83, or 1.17 mg/kg/d. A total of 112 subjects were studied. MetHB levels were detected at ≥ 4% in 46–50% 1 day after PQ treatment in all three groups and 4–9% of subjects had MetHB levels ≥ 4% 15 days after treatment. Only subjects receiving the highest doses of PQ had mild and brief adverse events, and 17% of them were associated with treatment. We conclude that when PQ is administered under certain conditions (i.e., normal glucose-6-phosphate dehydrogenase activity, in non-pregnant subjects and with a light meal), daily doses as high as 1.17 mg/kg do not represent a serious risk of high MetHB levels to patients.

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2009-02-01
2017-09-26
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  • Received : 05 Dec 2007
  • Accepted : 20 Aug 2008

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