Carol Downey, Audrey O'Donnell, Gavin McLaughlin
Nov 25, 2021
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Drug testing and analysis
Abstract
Benzodiazepines are a class of compounds used clinically to treat a variety of conditions including anxiety and insomnia. Their potential for abuse has led to a surge in their availability on the illegal drugs market. End users often rely on markings on illicit tablets to identify their contents. However, falsified tablets mimicking genuine pharmaceutical preparations often contain ingredients which differ from what people believe they are taking. The absence of any quality control of the content, purity or strength of fake tablets can result in adverse effects or even fatal outcomes. In recent years, drug seizures involving illicit round yellow tablets marked "5" on one side and "5617" below a score-line on the reverse have been submitted to Forensic Science Ireland (FSI) by An Garda Síochána (Irish Police) from throughout the Republic of Ireland. These findings relate to 26 different seizures; the cumulative tablet total seized was in excess of 20,000 and the total number of tablets of this description analyzed at FSI was 141. Irish users assume that the active ingredient present was diazepam. The qualitative analytical results for these tablets are reported. All tablets were found to contain 2-methylamino-5-chlorobenzophenone. In addition, the tablets contained either 2-amino-3-(2-chlorobenzoyl)-5-ethylthiophene or etizolam, or both. The constituents were present in varying relative amounts in visually similar tablets. Neither 2-amino-5-chlorobenzophenone nor 2-amino-3-(2-chlorobenzoyl)-5-ethylthiophene had previously been found in tablets analyzed at FSI.