Sir

Poisoning by ingestion of nitrate compounds has been well documented. We present a case of life threatening methemoglobinemia following accidental inhalation of nitrobenzene, managed successfully with intravenous methylene blue, ascorbic acid and mechanical ventilation. Acute methemoglobinemia often presents as a medical emergency requiring immediate treatment. Nitrobenzene is an oxidising compound used in the manufacture of aniline, pesticides, rubber chemicals and printing materials. A 24 year male was received in the emergency department with unconsciousness, frothing from mouth and cyanosis. A brief history revealed that the patient was found lying unconscious at hi