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Unintentional fatal intoxications with mitragynine and O-Desmethyltramadol from the herbal blend krypton
National Board of Forensic Medicine.
National Board of Forensic Medicine.
National Board of Forensic Medicine.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Forensic Medicine.
2011 (English)In: Journal of Analytical Toxicology, ISSN 0146-4760, Vol. 35, no 4, 242-247 p.Article in journal (Refereed) Published
Abstract [en]

The leaves of Kratom, a medicinal plant in Southeast Asia, have been used as an herbal drug for a long time. At least one of the alkaloids present in Kratom, mitraynine, is a mu-receptor agonist. Both Kratom and an additional preparation called Krypton are available via the internet. It seems to consist of powdered Kratom leaves with another mu-receptor agonist, O-desmethyltramadol added. O-desmethyltramadol is an acitve metabolite of tramadol, a commonly prescribed analgesic. We present nine cases of intoxication, occurring in a period of less than one year, where both mitragynine and O-desmethyltramadol were detected in the postmortem blood samples. neither tramadol nor N-desmethyltramadol was present in these samples, which implies that the ingested drug was O-desmethyltramadol. The blood concentrations of mitragynine, determined by ultra-performance liquid chromatography-tandem mass spectrometry, ranged from 0.02 to 0.18 μg/g, and O-desmethyltramadol concentrations, determined by gas chromatogtraphy with nitrogen-specific detection, ranged from 0.4 to 4.3 μg/g. We believe that the addition of the potent mu-receptor agonist O-desmethyltramadol to powdered leaves from Kratom contributed to the unintentional death of the nine cases presented and conclude that intake of Krypton is not as harmless as it often is described on internet websites.  

Place, publisher, year, edition, pages
2011. Vol. 35, no 4, 242-247 p.
Keyword [en]
Krypton, O-Desmethyltramadol
National Category
Pharmacology and Toxicology Forensic Science
Research subject
Forensic Medicine
URN: urn:nbn:se:umu:diva-43346OAI: diva2:413122
Available from: 2011-04-27 Created: 2011-04-27 Last updated: 2011-05-02Bibliographically approved

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