Pharmacology · single question

In a patient with G6PD deficiency, which risk is associated with certain local anesthetics (e.g., prilocaine/benzocaine)?

  1. Serotonin syndrome
  2. Malignant hyperthermia
  3. Methemoglobinemia (and hemolytic anemia)
  4. Hyperkalemia
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Correct answer: C. Methemoglobinemia (and hemolytic anemia)

  • A. Incorrect – caused by serotonergic drug combinations, not LA in G6PD.
  • B. Incorrect – that is triggered by volatile anesthetics/succinylcholine via RYR1 mutations, unrelated to G6PD.
  • C. Correct – G6PD-deficient red cells are vulnerable to oxidative stress; prilocaine/benzocaine can induce methemoglobinemia and hemolysis.
  • D. Incorrect – not the characteristic G6PD complication.

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