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Table 1 Clinical symptoms correlation with MetHb levels

From: A case of DAPSONE INDUCED METHEMOGLOBINEMIA

MetHb level (%) Clinical Presentation
0–3 None
3–10 Cyanosis, asymptomatic
10–20  
20–50 CNS changes (headache,dizziness,confusion
50–70 MetabolicAcidosis, dysrhythmias.
➢ 70 fatal