Abstract

The most frequent cause of raised methaemoglobin is from recreational drug use, with oxidation of the haem molecule leading to methaemoglobinaemia. Our case describes that of a man in his early thirties who presented with shortness of breath, hypoxia and methaemoglobinemia due to ingestion of impure cocaine mixed with local anaesthetic agents, a common cause of acquired methaemoglobinemia. This case report demonstrates the need for clinicians to consider methaemoglobinaemia as a differential diagnosis for patients presenting with hypoxia.

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