The Continuing Trend Of Sodium Nitrite Suicides: A Case Series And Brief Literature Review To Guide Diagnosis

Introduction: Sodium nitrite (NaNO) has worryingly emerged as an increasingly used method of suicide due to its ready availability and misleading online portrayal as a peaceful means of death.Recent media coverage, including a Channel 4 documentary, has drawn attention to a growing number of cases. Methods:We report three sodium-nitrite-related deaths occurring over a nine-month period (May 2024 -February 2025) in a district hospital in southeast England.Each case was investigated post-mortem, with additional toxicological testing for nitrites, nitrates, and methaemoglobin where indicated.Results: Not all cases displayed classic features such as chocolate-brown blood or organ discolouration.In each, different investigative triggers led to nitrite testing, confirming markedly elevated nitrite levels (up to 30,000-fold above normal).Methemoglobinemia was identified in all cases. Conclusion:Detection of sodium nitrite and methemoglobinemia post-mortem is challenging due to sample degradation.Early collection and analysis are essential for reliable results.Vigilance among clinicians and pathologists is vital, as no single diagnostic clue is universally present.Ongoing awareness and early toxicological testing are essential to ensure accurate case recognition and monitoring of this evolving trend.