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Case Reports in Critical Care
Volume 2014, Article ID 706021, 3 pages
Case Report

Black Coloured Urine following Organophosphorus Poisoning: Report of Two Cases

Department of General Medicine, Pondicherry Institute of Medical Sciences, Pondicherry 605014, India

Received 9 December 2013; Accepted 2 February 2014; Published 4 March 2014

Academic Editors: K. Lenz, C. Mammina, G. Pichler, and A. J. Reddy

Copyright © 2014 Aneesh Basheer et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Organophosphorus poisoning is common in rural Asia. Clinical features result from overactivity of acetylcholine receptors. Blackish discoloration of urine is not a feature of organophosphorus poisoning. Only one case of black colored urine following quinalphos poisoning has been reported in literature. We report two cases of organophosphorus poisoning from two different compounds, following which patients passed black colored urine, in the absence of haemolysis or rhabdomyolysis. These cases indicate that blackish discoloration of urine in organophosphorus poisoning might not be as uncommon as it was believed to be. Besides, urinary excretion of metabolites might be an underlying mechanism, rather than hemolysis.