sodium nitrite · Medicine question

Why can sodium nitrite make the skin look blue or grey?

iatroX medicinesPublished 21 August 2026Reviewed 21 August 2026

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It deliberately forms methaemoglobin, but excessive formation reduces oxygen delivery and may cause cyanosis, breathlessness or cardiovascular instability.

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Sodium Nitrite Solution for Injectionemc · SmPC Current selected SmPC · Version 2

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What is sodium nitrite used for in hospital?Can sodium nitrite be taken at home?Why is sodium nitrite given with sodium thiosulfate?Does sodium nitrite replace oxygen treatment?Can sodium nitrite lower blood pressure?Why is sodium nitrite used cautiously after smoke inhalation?

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