Primaquine-Induced Methemoglobinemia: A Case Report

Rita Leite Cruz1, César B Vieira1, Pedro Silva1

  • 1Intensive Care Service, São José Local Health Unit, Lisbon, PRT.

Cureus
|January 19, 2026
PubMed
Summary

Primaquine can cause life-threatening methemoglobinemia, a condition where hemoglobin cannot carry oxygen effectively. Promptly recognizing the discrepancy between oxygen levels and oxygenated hemoglobin is crucial for timely intervention.

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